21505320

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1$

素因数の和:136

約数の個数: 192

約数和(自身を含む): 75479040

約数和(自身を除く): 53973720

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 31, 36, 40, 41, 45, 47, 60, 62, 72, 82, 90, 93, 94, 120, 123, 124, 141, 155, 164, 180, 186, 188, 205, 235, 246, 248, 279, 282, 310, 328, 360, 369, 372, 376, 410, 423, 465, 470, 492, 558, 564, 615, 620, 705, 738, 744, 820, 846, 930, 940, 984, 1116, 1128, 1230, 1240, 1271, 1395, 1410, 1457, 1476, 1640, 1692, 1845, 1860, 1880, 1927, 2115, 2232, 2460, 2542, 2790, 2820, 2914, 2952, 3384, 3690, 3720, 3813, 3854, 4230, 4371, 4920, 5084, 5580, 5640, 5781, 5828, 6355, 7285, 7380, 7626, 7708, 8460, 8742, 9635, 10168, 11160, 11439, 11562, 11656, 12710, 13113, 14570, 14760, 15252, 15416, 16920, 17343, 17484, 19065, 19270, 21855, 22878, 23124, 25420, 26226, 28905, 29140, 30504, 34686, 34968, 38130, 38540, 43710, 45756, 46248, 50840, 52452, 57195, 57810, 58280, 59737, 65565, 69372, 76260, 77080, 86715, 87420, 91512, 104904, 114390, 115620, 119474, 131130, 138744, 152520, 173430, 174840, 179211, 228780, 231240, 238948, 262260, 298685, 346860, 358422, 457560, 477896, 524520, 537633, 597370, 693720, 716844, 896055, 1075266, 1194740, 1433688, 1792110, 2150532, 2389480, 2688165, 3584220, 4301064, 5376330, 7168440, 10752660, 21505320]

約数ペア:

[(1, 21505320), (2, 10752660), (3, 7168440), (4, 5376330), (5, 4301064), (6, 3584220), (8, 2688165), (9, 2389480), (10, 2150532), (12, 1792110), (15, 1433688), (18, 1194740), (20, 1075266), (24, 896055), (30, 716844), (31, 693720), (36, 597370), (40, 537633), (41, 524520), (45, 477896), (47, 457560), (60, 358422), (62, 346860), (72, 298685), (82, 262260), (90, 238948), (93, 231240), (94, 228780), (120, 179211), (123, 174840), (124, 173430), (141, 152520), (155, 138744), (164, 131130), (180, 119474), (186, 115620), (188, 114390), (205, 104904), (235, 91512), (246, 87420), (248, 86715), (279, 77080), (282, 76260), (310, 69372), (328, 65565), (360, 59737), (369, 58280), (372, 57810), (376, 57195), (410, 52452), (423, 50840), (465, 46248), (470, 45756), (492, 43710), (558, 38540), (564, 38130), (615, 34968), (620, 34686), (705, 30504), (738, 29140), (744, 28905), (820, 26226), (846, 25420), (930, 23124), (940, 22878), (984, 21855), (1116, 19270), (1128, 19065), (1230, 17484), (1240, 17343), (1271, 16920), (1395, 15416), (1410, 15252), (1457, 14760), (1476, 14570), (1640, 13113), (1692, 12710), (1845, 11656), (1860, 11562), (1880, 11439), (1927, 11160), (2115, 10168), (2232, 9635), (2460, 8742), (2542, 8460), (2790, 7708), (2820, 7626), (2914, 7380), (2952, 7285), (3384, 6355), (3690, 5828), (3720, 5781), (3813, 5640), (3854, 5580), (4230, 5084), (4371, 4920)]