81779240

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65951}}^1$

素因数の和:65993

約数の個数: 32

約数和(自身を含む): 189941760

約数和(自身を除く): 108162520

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 65951, 131902, 263804, 329755, 527608, 659510, 1319020, 2044481, 2638040, 4088962, 8177924, 10222405, 16355848, 20444810, 40889620, 81779240]

約数ペア:

[(1, 81779240), (2, 40889620), (4, 20444810), (5, 16355848), (8, 10222405), (10, 8177924), (20, 4088962), (31, 2638040), (40, 2044481), (62, 1319020), (124, 659510), (155, 527608), (248, 329755), (310, 263804), (620, 131902), (1240, 65951)]