81263260

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{312551}}^1$

素因数の和:312573

約数の個数: 24

約数和(自身を含む): 183780576

約数和(自身を除く): 102517316

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 312551, 625102, 1250204, 1562755, 3125510, 4063163, 6251020, 8126326, 16252652, 20315815, 40631630, 81263260]

約数ペア:

[(1, 81263260), (2, 40631630), (4, 20315815), (5, 16252652), (10, 8126326), (13, 6251020), (20, 4063163), (26, 3125510), (52, 1562755), (65, 1250204), (130, 625102), (260, 312551)]