721000390

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{421}}^1\times {\mathrm{15569}}^1$

素因数の和:16008

約数の個数: 32

約数和(自身を含む): 1419236640

約数和(自身を除く): 698236250

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 421, 842, 2105, 4210, 4631, 9262, 15569, 23155, 31138, 46310, 77845, 155690, 171259, 342518, 856295, 1712590, 6554549, 13109098, 32772745, 65545490, 72100039, 144200078, 360500195, 721000390]

約数ペア:

[(1, 721000390), (2, 360500195), (5, 144200078), (10, 72100039), (11, 65545490), (22, 32772745), (55, 13109098), (110, 6554549), (421, 1712590), (842, 856295), (2105, 342518), (4210, 171259), (4631, 155690), (9262, 77845), (15569, 46310), (23155, 31138)]