20405936680

素因数分解:

$2^3\times 5^1\times {\mathrm{317}}^1\times {\mathrm{1609301}}^1$

素因数の和:1609629

約数の個数: 32

約数和(自身を含む): 46058223240

約数和(自身を除く): 25652286560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 317, 634, 1268, 1585, 2536, 3170, 6340, 12680, 1609301, 3218602, 6437204, 8046505, 12874408, 16093010, 32186020, 64372040, 510148417, 1020296834, 2040593668, 2550742085, 4081187336, 5101484170, 10202968340, 20405936680]

約数ペア:

[(1, 20405936680), (2, 10202968340), (4, 5101484170), (5, 4081187336), (8, 2550742085), (10, 2040593668), (20, 1020296834), (40, 510148417), (317, 64372040), (634, 32186020), (1268, 16093010), (1585, 12874408), (2536, 8046505), (3170, 6437204), (6340, 3218602), (12680, 1609301)]