21207745

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{3931}}^1$

素因数の和:4032

約数の個数: 16

約数和(自身を含む): 27744192

約数和(自身を除く): 6536447

約数列:

[1, 5, 13, 65, 83, 415, 1079, 3931, 5395, 19655, 51103, 255515, 326273, 1631365, 4241549, 21207745]

約数ペア:

[(1, 21207745), (5, 4241549), (13, 1631365), (65, 326273), (83, 255515), (415, 51103), (1079, 19655), (3931, 5395)]