21268205

素因数分解:

$5^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{1847}}^1$

素因数の和:1913

約数の個数: 24

約数和(自身を含む): 30336768

約数和(自身を除く): 9068563

約数列:

[1, 5, 7, 35, 47, 49, 235, 245, 329, 1645, 1847, 2303, 9235, 11515, 12929, 64645, 86809, 90503, 434045, 452515, 607663, 3038315, 4253641, 21268205]

約数ペア:

[(1, 21268205), (5, 4253641), (7, 3038315), (35, 607663), (47, 452515), (49, 434045), (235, 90503), (245, 86809), (329, 64645), (1645, 12929), (1847, 11515), (2303, 9235)]