21479640

素因数分解:

$2^3\times 3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{281}}^1$

素因数の和:322

約数の個数: 192

約数和(自身を含む): 81012960

約数和(自身を除く): 59533320

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 20, 21, 24, 26, 28, 30, 35, 39, 40, 42, 49, 52, 56, 60, 65, 70, 78, 84, 91, 98, 104, 105, 120, 130, 140, 147, 156, 168, 182, 195, 196, 210, 245, 260, 273, 280, 281, 294, 312, 364, 390, 392, 420, 455, 490, 520, 546, 562, 588, 637, 728, 735, 780, 840, 843, 910, 980, 1092, 1124, 1176, 1274, 1365, 1405, 1470, 1560, 1686, 1820, 1911, 1960, 1967, 2184, 2248, 2548, 2730, 2810, 2940, 3185, 3372, 3640, 3653, 3822, 3934, 4215, 5096, 5460, 5620, 5880, 5901, 6370, 6744, 7306, 7644, 7868, 8430, 9555, 9835, 10920, 10959, 11240, 11802, 12740, 13769, 14612, 15288, 15736, 16860, 18265, 19110, 19670, 21918, 23604, 25480, 25571, 27538, 29224, 29505, 33720, 36530, 38220, 39340, 41307, 43836, 47208, 51142, 54795, 55076, 59010, 68845, 73060, 76440, 76713, 78680, 82614, 87672, 102284, 109590, 110152, 118020, 127855, 137690, 146120, 153426, 165228, 178997, 204568, 206535, 219180, 236040, 255710, 275380, 306852, 330456, 357994, 383565, 413070, 438360, 511420, 536991, 550760, 613704, 715988, 767130, 826140, 894985, 1022840, 1073982, 1431976, 1534260, 1652280, 1789970, 2147964, 2684955, 3068520, 3579940, 4295928, 5369910, 7159880, 10739820, 21479640]

約数ペア:

[(1, 21479640), (2, 10739820), (3, 7159880), (4, 5369910), (5, 4295928), (6, 3579940), (7, 3068520), (8, 2684955), (10, 2147964), (12, 1789970), (13, 1652280), (14, 1534260), (15, 1431976), (20, 1073982), (21, 1022840), (24, 894985), (26, 826140), (28, 767130), (30, 715988), (35, 613704), (39, 550760), (40, 536991), (42, 511420), (49, 438360), (52, 413070), (56, 383565), (60, 357994), (65, 330456), (70, 306852), (78, 275380), (84, 255710), (91, 236040), (98, 219180), (104, 206535), (105, 204568), (120, 178997), (130, 165228), (140, 153426), (147, 146120), (156, 137690), (168, 127855), (182, 118020), (195, 110152), (196, 109590), (210, 102284), (245, 87672), (260, 82614), (273, 78680), (280, 76713), (281, 76440), (294, 73060), (312, 68845), (364, 59010), (390, 55076), (392, 54795), (420, 51142), (455, 47208), (490, 43836), (520, 41307), (546, 39340), (562, 38220), (588, 36530), (637, 33720), (728, 29505), (735, 29224), (780, 27538), (840, 25571), (843, 25480), (910, 23604), (980, 21918), (1092, 19670), (1124, 19110), (1176, 18265), (1274, 16860), (1365, 15736), (1405, 15288), (1470, 14612), (1560, 13769), (1686, 12740), (1820, 11802), (1911, 11240), (1960, 10959), (1967, 10920), (2184, 9835), (2248, 9555), (2548, 8430), (2730, 7868), (2810, 7644), (2940, 7306), (3185, 6744), (3372, 6370), (3640, 5901), (3653, 5880), (3822, 5620), (3934, 5460), (4215, 5096)]