81407240

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65651}}^1$

素因数の和:65693

約数の個数: 32

約数和(自身を含む): 189077760

約数和(自身を除く): 107670520

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 65651, 131302, 262604, 328255, 525208, 656510, 1313020, 2035181, 2626040, 4070362, 8140724, 10175905, 16281448, 20351810, 40703620, 81407240]

約数ペア:

[(1, 81407240), (2, 40703620), (4, 20351810), (5, 16281448), (8, 10175905), (10, 8140724), (20, 4070362), (31, 2626040), (40, 2035181), (62, 1313020), (124, 656510), (155, 525208), (248, 328255), (310, 262604), (620, 131302), (1240, 65651)]