21531445

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{83}}^1\times {\mathrm{307}}^1$

素因数の和:421

約数の個数: 24

約数和(自身を含む): 28407456

約数和(自身を除く): 6876011

約数列:

[1, 5, 13, 65, 83, 169, 307, 415, 845, 1079, 1535, 3991, 5395, 14027, 19955, 25481, 51883, 70135, 127405, 259415, 331253, 1656265, 4306289, 21531445]

約数ペア:

[(1, 21531445), (5, 4306289), (13, 1656265), (65, 331253), (83, 259415), (169, 127405), (307, 70135), (415, 51883), (845, 25481), (1079, 19955), (1535, 14027), (3991, 5395)]