21900775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{853}}^1$

素因数の和:955

約数の個数: 24

約数和(自身を含む): 29650880

約数和(自身を除く): 7750105

約数列:

[1, 5, 13, 25, 65, 79, 325, 395, 853, 1027, 1975, 4265, 5135, 11089, 21325, 25675, 55445, 67387, 277225, 336935, 876031, 1684675, 4380155, 21900775]

約数ペア:

[(1, 21900775), (5, 4380155), (13, 1684675), (25, 876031), (65, 336935), (79, 277225), (325, 67387), (395, 55445), (853, 25675), (1027, 21325), (1975, 11089), (4265, 5135)]