129625420

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{64171}}^1$

素因数の和:64281

約数の個数: 24

約数和(自身を含む): 274912848

約数和(自身を除く): 145287428

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 64171, 128342, 256684, 320855, 641710, 1283420, 6481271, 12962542, 25925084, 32406355, 64812710, 129625420]

約数ペア:

[(1, 129625420), (2, 64812710), (4, 32406355), (5, 25925084), (10, 12962542), (20, 6481271), (101, 1283420), (202, 641710), (404, 320855), (505, 256684), (1010, 128342), (2020, 64171)]