64801980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{521}}^1\times {\mathrm{691}}^1$

素因数の和:1227

約数の個数: 72

約数和(自身を含む): 197228304

約数和(自身を除く): 132426324

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 521, 691, 1042, 1382, 1563, 2073, 2084, 2605, 2764, 3126, 3455, 4146, 4689, 5210, 6219, 6252, 6910, 7815, 8292, 9378, 10365, 10420, 12438, 13820, 15630, 18756, 20730, 23445, 24876, 31095, 31260, 41460, 46890, 62190, 93780, 124380, 360011, 720022, 1080033, 1440044, 1800055, 2160066, 3240099, 3600110, 4320132, 5400165, 6480198, 7200220, 10800330, 12960396, 16200495, 21600660, 32400990, 64801980]

約数ペア:

[(1, 64801980), (2, 32400990), (3, 21600660), (4, 16200495), (5, 12960396), (6, 10800330), (9, 7200220), (10, 6480198), (12, 5400165), (15, 4320132), (18, 3600110), (20, 3240099), (30, 2160066), (36, 1800055), (45, 1440044), (60, 1080033), (90, 720022), (180, 360011), (521, 124380), (691, 93780), (1042, 62190), (1382, 46890), (1563, 41460), (2073, 31260), (2084, 31095), (2605, 24876), (2764, 23445), (3126, 20730), (3455, 18756), (4146, 15630), (4689, 13820), (5210, 12438), (6219, 10420), (6252, 10365), (6910, 9378), (7815, 8292)]