21397519

素因数分解:

${\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{223}}^1$

素因数の和:319

約数の個数: 24

約数和(自身を含む): 25859456

約数和(自身を除く): 4461937

約数列:

[1, 11, 13, 61, 121, 143, 223, 671, 793, 1573, 2453, 2899, 7381, 8723, 13603, 26983, 31889, 95953, 149633, 176839, 350779, 1645963, 1945229, 21397519]

約数ペア:

[(1, 21397519), (11, 1945229), (13, 1645963), (61, 350779), (121, 176839), (143, 149633), (223, 95953), (671, 31889), (793, 26983), (1573, 13603), (2453, 8723), (2899, 7381)]