81387960

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{443}}^1\times {\mathrm{1531}}^1$

素因数の和:1988

約数の個数: 64

約数和(自身を含む): 244874880

約数和(自身を除く): 163486920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 443, 886, 1329, 1531, 1772, 2215, 2658, 3062, 3544, 4430, 4593, 5316, 6124, 6645, 7655, 8860, 9186, 10632, 12248, 13290, 15310, 17720, 18372, 22965, 26580, 30620, 36744, 45930, 53160, 61240, 91860, 183720, 678233, 1356466, 2034699, 2712932, 3391165, 4069398, 5425864, 6782330, 8138796, 10173495, 13564660, 16277592, 20346990, 27129320, 40693980, 81387960]

約数ペア:

[(1, 81387960), (2, 40693980), (3, 27129320), (4, 20346990), (5, 16277592), (6, 13564660), (8, 10173495), (10, 8138796), (12, 6782330), (15, 5425864), (20, 4069398), (24, 3391165), (30, 2712932), (40, 2034699), (60, 1356466), (120, 678233), (443, 183720), (886, 91860), (1329, 61240), (1531, 53160), (1772, 45930), (2215, 36744), (2658, 30620), (3062, 26580), (3544, 22965), (4430, 18372), (4593, 17720), (5316, 15310), (6124, 13290), (6645, 12248), (7655, 10632), (8860, 9186)]