81410020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{57331}}^1$

素因数の和:57411

約数の個数: 24

約数和(自身を含む): 173371968

約数和(自身を除く): 91961948

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 57331, 114662, 229324, 286655, 573310, 1146620, 4070501, 8141002, 16282004, 20352505, 40705010, 81410020]

約数ペア:

[(1, 81410020), (2, 40705010), (4, 20352505), (5, 16282004), (10, 8141002), (20, 4070501), (71, 1146620), (142, 573310), (284, 286655), (355, 229324), (710, 114662), (1420, 57331)]