20891885

素因数分解:

$5^1\times 7^2\times {\mathrm{269}}^1\times {\mathrm{317}}^1$

素因数の和:605

約数の個数: 24

約数和(自身を含む): 29364120

約数和(自身を除く): 8472235

約数列:

[1, 5, 7, 35, 49, 245, 269, 317, 1345, 1585, 1883, 2219, 9415, 11095, 13181, 15533, 65905, 77665, 85273, 426365, 596911, 2984555, 4178377, 20891885]

約数ペア:

[(1, 20891885), (5, 4178377), (7, 2984555), (35, 596911), (49, 426365), (245, 85273), (269, 77665), (317, 65905), (1345, 15533), (1585, 13181), (1883, 11095), (2219, 9415)]