1577779640

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{646631}}^1$

素因数の和:646703

約数の個数: 32

約数和(自身を含む): 3608206560

約数和(自身を除く): 2030426920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 646631, 1293262, 2586524, 3233155, 5173048, 6466310, 12932620, 25865240, 39444491, 78888982, 157777964, 197222455, 315555928, 394444910, 788889820, 1577779640]

約数ペア:

[(1, 1577779640), (2, 788889820), (4, 394444910), (5, 315555928), (8, 197222455), (10, 157777964), (20, 78888982), (40, 39444491), (61, 25865240), (122, 12932620), (244, 6466310), (305, 5173048), (488, 3233155), (610, 2586524), (1220, 1293262), (2440, 646631)]