21656475

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{3319}}^1$

素因数の和:3364

約数の個数: 36

約数和(自身を含む): 40138800

約数和(自身を除く): 18482325

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 75, 87, 145, 225, 261, 435, 725, 1305, 2175, 3319, 6525, 9957, 16595, 29871, 49785, 82975, 96251, 149355, 248925, 288753, 481255, 746775, 866259, 1443765, 2406275, 4331295, 7218825, 21656475]

約数ペア:

[(1, 21656475), (3, 7218825), (5, 4331295), (9, 2406275), (15, 1443765), (25, 866259), (29, 746775), (45, 481255), (75, 288753), (87, 248925), (145, 149355), (225, 96251), (261, 82975), (435, 49785), (725, 29871), (1305, 16595), (2175, 9957), (3319, 6525)]