405242020

素因数分解:

$2^2\times 5^1\times {\mathrm{20262101}}^1$

素因数の和:20262110

約数の個数: 12

約数和(自身を含む): 851008284

約数和(自身を除く): 445766264

約数列:

[1, 2, 4, 5, 10, 20, 20262101, 40524202, 81048404, 101310505, 202621010, 405242020]

約数ペア:

[(1, 405242020), (2, 202621010), (4, 101310505), (5, 81048404), (10, 40524202), (20, 20262101)]