128999940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{41}}^2\times {\mathrm{1279}}^1$

素因数の和:1373

約数の個数: 72

約数和(自身を含む): 370513920

約数和(自身を除く): 241513980

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 41, 60, 82, 123, 164, 205, 246, 410, 492, 615, 820, 1230, 1279, 1681, 2460, 2558, 3362, 3837, 5043, 5116, 6395, 6724, 7674, 8405, 10086, 12790, 15348, 16810, 19185, 20172, 25215, 25580, 33620, 38370, 50430, 52439, 76740, 100860, 104878, 157317, 209756, 262195, 314634, 524390, 629268, 786585, 1048780, 1573170, 2149999, 3146340, 4299998, 6449997, 8599996, 10749995, 12899994, 21499990, 25799988, 32249985, 42999980, 64499970, 128999940]

約数ペア:

[(1, 128999940), (2, 64499970), (3, 42999980), (4, 32249985), (5, 25799988), (6, 21499990), (10, 12899994), (12, 10749995), (15, 8599996), (20, 6449997), (30, 4299998), (41, 3146340), (60, 2149999), (82, 1573170), (123, 1048780), (164, 786585), (205, 629268), (246, 524390), (410, 314634), (492, 262195), (615, 209756), (820, 157317), (1230, 104878), (1279, 100860), (1681, 76740), (2460, 52439), (2558, 50430), (3362, 38370), (3837, 33620), (5043, 25580), (5116, 25215), (6395, 20172), (6724, 19185), (7674, 16810), (8405, 15348), (10086, 12790)]