19855820

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{3863}}^1$

素因数の和:4129

約数の個数: 24

約数和(自身を含む): 41870304

約数和(自身を除く): 22014484

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 3863, 5140, 7726, 15452, 19315, 38630, 77260, 992791, 1985582, 3971164, 4963955, 9927910, 19855820]

約数ペア:

[(1, 19855820), (2, 9927910), (4, 4963955), (5, 3971164), (10, 1985582), (20, 992791), (257, 77260), (514, 38630), (1028, 19315), (1285, 15452), (2570, 7726), (3863, 5140)]