20177820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{8623}}^1$

素因数の和:8651

約数の個数: 72

約数和(自身を含む): 65921856

約数和(自身を除く): 45744036

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 90, 117, 130, 156, 180, 195, 234, 260, 390, 468, 585, 780, 1170, 2340, 8623, 17246, 25869, 34492, 43115, 51738, 77607, 86230, 103476, 112099, 129345, 155214, 172460, 224198, 258690, 310428, 336297, 388035, 448396, 517380, 560495, 672594, 776070, 1008891, 1120990, 1345188, 1552140, 1681485, 2017782, 2241980, 3362970, 4035564, 5044455, 6725940, 10088910, 20177820]

約数ペア:

[(1, 20177820), (2, 10088910), (3, 6725940), (4, 5044455), (5, 4035564), (6, 3362970), (9, 2241980), (10, 2017782), (12, 1681485), (13, 1552140), (15, 1345188), (18, 1120990), (20, 1008891), (26, 776070), (30, 672594), (36, 560495), (39, 517380), (45, 448396), (52, 388035), (60, 336297), (65, 310428), (78, 258690), (90, 224198), (117, 172460), (130, 155214), (156, 129345), (180, 112099), (195, 103476), (234, 86230), (260, 77607), (390, 51738), (468, 43115), (585, 34492), (780, 25869), (1170, 17246), (2340, 8623)]