81639340

素因数分解:

$2^2\times 5^1\times {\mathrm{613}}^1\times {\mathrm{6659}}^1$

素因数の和:7281

約数の個数: 24

約数和(自身を含む): 171748080

約数和(自身を除く): 90108740

約数列:

[1, 2, 4, 5, 10, 20, 613, 1226, 2452, 3065, 6130, 6659, 12260, 13318, 26636, 33295, 66590, 133180, 4081967, 8163934, 16327868, 20409835, 40819670, 81639340]

約数ペア:

[(1, 81639340), (2, 40819670), (4, 20409835), (5, 16327868), (10, 8163934), (20, 4081967), (613, 133180), (1226, 66590), (2452, 33295), (3065, 26636), (6130, 13318), (6659, 12260)]