420123478

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1\times {\mathrm{26261}}^1$

素因数の和:26703

約数の個数: 16

約数和(自身を含む): 664953840

約数和(自身を除く): 244830362

約数列:

[1, 2, 19, 38, 421, 842, 7999, 15998, 26261, 52522, 498959, 997918, 11055881, 22111762, 210061739, 420123478]

約数ペア:

[(1, 420123478), (2, 210061739), (19, 22111762), (38, 11055881), (421, 997918), (842, 498959), (7999, 52522), (15998, 26261)]