21989125

素因数分解:

$5^3\times {\mathrm{43}}^1\times {\mathrm{4091}}^1$

素因数の和:4149

約数の個数: 16

約数和(自身を含む): 28087488

約数和(自身を除く): 6098363

約数列:

[1, 5, 25, 43, 125, 215, 1075, 4091, 5375, 20455, 102275, 175913, 511375, 879565, 4397825, 21989125]

約数ペア:

[(1, 21989125), (5, 4397825), (25, 879565), (43, 511375), (125, 175913), (215, 102275), (1075, 20455), (4091, 5375)]