21068260

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25693}}^1$

素因数の和:25743

約数の個数: 24

約数和(自身を含む): 45324216

約数和(自身を除く): 24255956

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25693, 51386, 102772, 128465, 256930, 513860, 1053413, 2106826, 4213652, 5267065, 10534130, 21068260]

約数ペア:

[(1, 21068260), (2, 10534130), (4, 5267065), (5, 4213652), (10, 2106826), (20, 1053413), (41, 513860), (82, 256930), (164, 128465), (205, 102772), (410, 51386), (820, 25693)]