19729060

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^3\times {\mathrm{449}}^1$

素因数の和:497

約数の個数: 48

約数和(自身を含む): 44982000

約数和(自身を除く): 25252940

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 449, 676, 845, 898, 1690, 1796, 2197, 2245, 3380, 4394, 4490, 5837, 8788, 8980, 10985, 11674, 21970, 23348, 29185, 43940, 58370, 75881, 116740, 151762, 303524, 379405, 758810, 986453, 1517620, 1972906, 3945812, 4932265, 9864530, 19729060]

約数ペア:

[(1, 19729060), (2, 9864530), (4, 4932265), (5, 3945812), (10, 1972906), (13, 1517620), (20, 986453), (26, 758810), (52, 379405), (65, 303524), (130, 151762), (169, 116740), (260, 75881), (338, 58370), (449, 43940), (676, 29185), (845, 23348), (898, 21970), (1690, 11674), (1796, 10985), (2197, 8980), (2245, 8788), (3380, 5837), (4394, 4490)]