20568080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19777}}^1$

素因数の和:19803

約数の個数: 40

約数和(自身を含む): 51501912

約数和(自身を除く): 30933832

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19777, 39554, 79108, 98885, 158216, 197770, 257101, 316432, 395540, 514202, 791080, 1028404, 1285505, 1582160, 2056808, 2571010, 4113616, 5142020, 10284040, 20568080]

約数ペア:

[(1, 20568080), (2, 10284040), (4, 5142020), (5, 4113616), (8, 2571010), (10, 2056808), (13, 1582160), (16, 1285505), (20, 1028404), (26, 791080), (40, 514202), (52, 395540), (65, 316432), (80, 257101), (104, 197770), (130, 158216), (208, 98885), (260, 79108), (520, 39554), (1040, 19777)]