21920525

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{1009}}^1$

素因数の和:1109

約数の個数: 24

約数和(自身を含む): 30057600

約数和(自身を除く): 8137075

約数列:

[1, 5, 11, 25, 55, 79, 275, 395, 869, 1009, 1975, 4345, 5045, 11099, 21725, 25225, 55495, 79711, 277475, 398555, 876821, 1992775, 4384105, 21920525]

約数ペア:

[(1, 21920525), (5, 4384105), (11, 1992775), (25, 876821), (55, 398555), (79, 277475), (275, 79711), (395, 55495), (869, 25225), (1009, 21725), (1975, 11099), (4345, 5045)]