21720064325

素因数分解:

$5^2\times {\mathrm{43}}^2\times {\mathrm{469877}}^1$

素因数の和:469973

約数の個数: 18

約数和(自身を含む): 27573850674

約数和(自身を除く): 5853786349

約数列:

[1, 5, 25, 43, 215, 1075, 1849, 9245, 46225, 469877, 2349385, 11746925, 20204711, 101023555, 505117775, 868802573, 4344012865, 21720064325]

約数ペア:

[(1, 21720064325), (5, 4344012865), (25, 868802573), (43, 505117775), (215, 101023555), (1075, 20204711), (1849, 11746925), (9245, 2349385), (46225, 469877)]