21655980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{3881}}^1$

素因数の和:3927

約数の個数: 72

約数和(自身を含む): 67826304

約数和(自身を除く): 46170324

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 31, 36, 45, 60, 62, 90, 93, 124, 155, 180, 186, 279, 310, 372, 465, 558, 620, 930, 1116, 1395, 1860, 2790, 3881, 5580, 7762, 11643, 15524, 19405, 23286, 34929, 38810, 46572, 58215, 69858, 77620, 116430, 120311, 139716, 174645, 232860, 240622, 349290, 360933, 481244, 601555, 698580, 721866, 1082799, 1203110, 1443732, 1804665, 2165598, 2406220, 3609330, 4331196, 5413995, 7218660, 10827990, 21655980]

約数ペア:

[(1, 21655980), (2, 10827990), (3, 7218660), (4, 5413995), (5, 4331196), (6, 3609330), (9, 2406220), (10, 2165598), (12, 1804665), (15, 1443732), (18, 1203110), (20, 1082799), (30, 721866), (31, 698580), (36, 601555), (45, 481244), (60, 360933), (62, 349290), (90, 240622), (93, 232860), (124, 174645), (155, 139716), (180, 120311), (186, 116430), (279, 77620), (310, 69858), (372, 58215), (465, 46572), (558, 38810), (620, 34929), (930, 23286), (1116, 19405), (1395, 15524), (1860, 11643), (2790, 7762), (3881, 5580)]