20171905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{3739}}^1$

素因数の和:3840

約数の個数: 16

約数和(自身を含む): 26389440

約数和(自身を除く): 6217535

約数列:

[1, 5, 13, 65, 83, 415, 1079, 3739, 5395, 18695, 48607, 243035, 310337, 1551685, 4034381, 20171905]

約数ペア:

[(1, 20171905), (5, 4034381), (13, 1551685), (65, 310337), (83, 243035), (415, 48607), (1079, 18695), (3739, 5395)]