20503925

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{211}}^1$

素因数の和:270

約数の個数: 36

約数和(自身を含む): 28864224

約数和(自身を除く): 8360299

約数列:

[1, 5, 13, 23, 25, 65, 115, 169, 211, 299, 325, 575, 845, 1055, 1495, 2743, 3887, 4225, 4853, 5275, 7475, 13715, 19435, 24265, 35659, 63089, 68575, 97175, 121325, 178295, 315445, 820157, 891475, 1577225, 4100785, 20503925]

約数ペア:

[(1, 20503925), (5, 4100785), (13, 1577225), (23, 891475), (25, 820157), (65, 315445), (115, 178295), (169, 121325), (211, 97175), (299, 68575), (325, 63089), (575, 35659), (845, 24265), (1055, 19435), (1495, 13715), (2743, 7475), (3887, 5275), (4225, 4853)]