20577557

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{337}}^1$

素因数の和:429

約数の個数: 32

約数和(自身を含む): 28164864

約数和(自身を除く): 7587307

約数列:

[1, 7, 11, 13, 61, 77, 91, 143, 337, 427, 671, 793, 1001, 2359, 3707, 4381, 4697, 5551, 8723, 20557, 25949, 30667, 48191, 61061, 143899, 226127, 267241, 337337, 1582889, 1870687, 2939651, 20577557]

約数ペア:

[(1, 20577557), (7, 2939651), (11, 1870687), (13, 1582889), (61, 337337), (77, 267241), (91, 226127), (143, 143899), (337, 61061), (427, 48191), (671, 30667), (793, 25949), (1001, 20557), (2359, 8723), (3707, 5551), (4381, 4697)]