20900705

素因数分解:

$5^1\times 7^4\times {\mathrm{1741}}^1$

素因数の和:1774

約数の個数: 20

約数和(自身を含む): 29276052

約数和(自身を除く): 8375347

約数列:

[1, 5, 7, 35, 49, 245, 343, 1715, 1741, 2401, 8705, 12005, 12187, 60935, 85309, 426545, 597163, 2985815, 4180141, 20900705]

約数ペア:

[(1, 20900705), (5, 4180141), (7, 2985815), (35, 597163), (49, 426545), (245, 85309), (343, 60935), (1715, 12187), (1741, 12005), (2401, 8705)]