21915901

素因数分解:

$7^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1\times {\mathrm{563}}^1$

素因数の和:720

約数の個数: 16

約数和(自身を含む): 25772544

約数和(自身を除く): 3856643

約数列:

[1, 7, 67, 83, 469, 563, 581, 3941, 5561, 37721, 38927, 46729, 264047, 327103, 3130843, 21915901]

約数ペア:

[(1, 21915901), (7, 3130843), (67, 327103), (83, 264047), (469, 46729), (563, 38927), (581, 37721), (3941, 5561)]