208685428

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{240421}}^1$

素因数の和:240463

約数の個数: 24

約数和(自身を含む): 430836224

約数和(自身を除く): 222150796

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 124, 217, 434, 868, 240421, 480842, 961684, 1682947, 3365894, 6731788, 7453051, 14906102, 29812204, 52171357, 104342714, 208685428]

約数ペア:

[(1, 208685428), (2, 104342714), (4, 52171357), (7, 29812204), (14, 14906102), (28, 7453051), (31, 6731788), (62, 3365894), (124, 1682947), (217, 961684), (434, 480842), (868, 240421)]