280003990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{137933}}^1$

素因数の和:137976

約数の個数: 32

約数和(自身を含む): 595874880

約数和(自身を除く): 315870890

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 58, 70, 145, 203, 290, 406, 1015, 2030, 137933, 275866, 689665, 965531, 1379330, 1931062, 4000057, 4827655, 8000114, 9655310, 20000285, 28000399, 40000570, 56000798, 140001995, 280003990]

約数ペア:

[(1, 280003990), (2, 140001995), (5, 56000798), (7, 40000570), (10, 28000399), (14, 20000285), (29, 9655310), (35, 8000114), (58, 4827655), (70, 4000057), (145, 1931062), (203, 1379330), (290, 965531), (406, 689665), (1015, 275866), (2030, 137933)]