641360

素因数分解:

$2^4\times 5^1\times {\mathrm{8017}}^1$

素因数の和:8030

約数の個数: 20

約数和(自身を含む): 1491348

約数和(自身を除く): 849988

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8017, 16034, 32068, 40085, 64136, 80170, 128272, 160340, 320680, 641360]

約数ペア:

[(1, 641360), (2, 320680), (4, 160340), (5, 128272), (8, 80170), (10, 64136), (16, 40085), (20, 32068), (40, 16034), (80, 8017)]