398766320

素因数分解:

$2^4\times 5^1\times {\mathrm{4984579}}^1$

素因数の和:4984592

約数の個数: 20

約数和(自身を含む): 927131880

約数和(自身を除く): 528365560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 4984579, 9969158, 19938316, 24922895, 39876632, 49845790, 79753264, 99691580, 199383160, 398766320]

約数ペア:

[(1, 398766320), (2, 199383160), (4, 99691580), (5, 79753264), (8, 49845790), (10, 39876632), (16, 24922895), (20, 19938316), (40, 9969158), (80, 4984579)]