397052420

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^2\times {\mathrm{3181}}^1$

素因数の和:3348

約数の個数: 36

約数和(自身を含む): 844763724

約数和(自身を除く): 447711304

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 3181, 6241, 6362, 12482, 12724, 15905, 24964, 31205, 31810, 62410, 63620, 124820, 251299, 502598, 1005196, 1256495, 2512990, 5025980, 19852621, 39705242, 79410484, 99263105, 198526210, 397052420]

約数ペア:

[(1, 397052420), (2, 198526210), (4, 99263105), (5, 79410484), (10, 39705242), (20, 19852621), (79, 5025980), (158, 2512990), (316, 1256495), (395, 1005196), (790, 502598), (1580, 251299), (3181, 124820), (6241, 63620), (6362, 62410), (12482, 31810), (12724, 31205), (15905, 24964)]