21356260

素因数分解:

$2^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{6551}}^1$

素因数の和:6723

約数の個数: 24

約数和(自身を含む): 45130176

約数和(自身を除く): 23773916

約数列:

[1, 2, 4, 5, 10, 20, 163, 326, 652, 815, 1630, 3260, 6551, 13102, 26204, 32755, 65510, 131020, 1067813, 2135626, 4271252, 5339065, 10678130, 21356260]

約数ペア:

[(1, 21356260), (2, 10678130), (4, 5339065), (5, 4271252), (10, 2135626), (20, 1067813), (163, 131020), (326, 65510), (652, 32755), (815, 26204), (1630, 13102), (3260, 6551)]