20245420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{77867}}^1$

素因数の和:77889

約数の個数: 24

約数和(自身を含む): 45786384

約数和(自身を除く): 25540964

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 77867, 155734, 311468, 389335, 778670, 1012271, 1557340, 2024542, 4049084, 5061355, 10122710, 20245420]

約数ペア:

[(1, 20245420), (2, 10122710), (4, 5061355), (5, 4049084), (10, 2024542), (13, 1557340), (20, 1012271), (26, 778670), (52, 389335), (65, 311468), (130, 155734), (260, 77867)]