20856140

素因数分解:

$2^2\times 5^1\times {\mathrm{241}}^1\times {\mathrm{4327}}^1$

素因数の和:4577

約数の個数: 24

約数和(自身を含む): 43989792

約数和(自身を除く): 23133652

約数列:

[1, 2, 4, 5, 10, 20, 241, 482, 964, 1205, 2410, 4327, 4820, 8654, 17308, 21635, 43270, 86540, 1042807, 2085614, 4171228, 5214035, 10428070, 20856140]

約数ペア:

[(1, 20856140), (2, 10428070), (4, 5214035), (5, 4171228), (10, 2085614), (20, 1042807), (241, 86540), (482, 43270), (964, 21635), (1205, 17308), (2410, 8654), (4327, 4820)]