21285360

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:120

約数の個数: 240

約数和(自身を含む): 79387776

約数和(自身を除く): 58102416

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 17, 18, 20, 24, 30, 34, 36, 37, 40, 45, 47, 48, 51, 60, 68, 72, 74, 80, 85, 90, 94, 102, 111, 120, 136, 141, 144, 148, 153, 170, 180, 185, 188, 204, 222, 235, 240, 255, 272, 282, 296, 306, 333, 340, 360, 370, 376, 408, 423, 444, 470, 510, 555, 564, 592, 612, 629, 666, 680, 705, 720, 740, 752, 765, 799, 816, 846, 888, 940, 1020, 1110, 1128, 1224, 1258, 1332, 1360, 1410, 1480, 1530, 1598, 1665, 1692, 1739, 1776, 1880, 1887, 2040, 2115, 2220, 2256, 2397, 2448, 2516, 2664, 2820, 2960, 3060, 3145, 3196, 3330, 3384, 3478, 3760, 3774, 3995, 4080, 4230, 4440, 4794, 5032, 5217, 5328, 5640, 5661, 6120, 6290, 6392, 6660, 6768, 6956, 7191, 7548, 7990, 8460, 8695, 8880, 9435, 9588, 10064, 10434, 11280, 11322, 11985, 12240, 12580, 12784, 13320, 13912, 14382, 15096, 15651, 15980, 16920, 17390, 18870, 19176, 20868, 22644, 23970, 25160, 26085, 26640, 27824, 28305, 28764, 29563, 30192, 31302, 31960, 33840, 34780, 35955, 37740, 38352, 41736, 45288, 47940, 50320, 52170, 56610, 57528, 59126, 62604, 63920, 69560, 71910, 75480, 78255, 83472, 88689, 90576, 95880, 104340, 113220, 115056, 118252, 125208, 139120, 143820, 147815, 150960, 156510, 177378, 191760, 208680, 226440, 236504, 250416, 266067, 287640, 295630, 313020, 354756, 417360, 443445, 452880, 473008, 532134, 575280, 591260, 626040, 709512, 886890, 1064268, 1182520, 1252080, 1330335, 1419024, 1773780, 2128536, 2365040, 2660670, 3547560, 4257072, 5321340, 7095120, 10642680, 21285360]

約数ペア:

[(1, 21285360), (2, 10642680), (3, 7095120), (4, 5321340), (5, 4257072), (6, 3547560), (8, 2660670), (9, 2365040), (10, 2128536), (12, 1773780), (15, 1419024), (16, 1330335), (17, 1252080), (18, 1182520), (20, 1064268), (24, 886890), (30, 709512), (34, 626040), (36, 591260), (37, 575280), (40, 532134), (45, 473008), (47, 452880), (48, 443445), (51, 417360), (60, 354756), (68, 313020), (72, 295630), (74, 287640), (80, 266067), (85, 250416), (90, 236504), (94, 226440), (102, 208680), (111, 191760), (120, 177378), (136, 156510), (141, 150960), (144, 147815), (148, 143820), (153, 139120), (170, 125208), (180, 118252), (185, 115056), (188, 113220), (204, 104340), (222, 95880), (235, 90576), (240, 88689), (255, 83472), (272, 78255), (282, 75480), (296, 71910), (306, 69560), (333, 63920), (340, 62604), (360, 59126), (370, 57528), (376, 56610), (408, 52170), (423, 50320), (444, 47940), (470, 45288), (510, 41736), (555, 38352), (564, 37740), (592, 35955), (612, 34780), (629, 33840), (666, 31960), (680, 31302), (705, 30192), (720, 29563), (740, 28764), (752, 28305), (765, 27824), (799, 26640), (816, 26085), (846, 25160), (888, 23970), (940, 22644), (1020, 20868), (1110, 19176), (1128, 18870), (1224, 17390), (1258, 16920), (1332, 15980), (1360, 15651), (1410, 15096), (1480, 14382), (1530, 13912), (1598, 13320), (1665, 12784), (1692, 12580), (1739, 12240), (1776, 11985), (1880, 11322), (1887, 11280), (2040, 10434), (2115, 10064), (2220, 9588), (2256, 9435), (2397, 8880), (2448, 8695), (2516, 8460), (2664, 7990), (2820, 7548), (2960, 7191), (3060, 6956), (3145, 6768), (3196, 6660), (3330, 6392), (3384, 6290), (3478, 6120), (3760, 5661), (3774, 5640), (3995, 5328), (4080, 5217), (4230, 5032), (4440, 4794)]