21216375

素因数分解:

$3^2\times 5^3\times {\mathrm{18859}}^1$

素因数の和:18880

約数の個数: 24

約数和(自身を含む): 38248080

約数和(自身を除く): 17031705

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375, 1125, 18859, 56577, 94295, 169731, 282885, 471475, 848655, 1414425, 2357375, 4243275, 7072125, 21216375]

約数ペア:

[(1, 21216375), (3, 7072125), (5, 4243275), (9, 2357375), (15, 1414425), (25, 848655), (45, 471475), (75, 282885), (125, 169731), (225, 94295), (375, 56577), (1125, 18859)]