21784125

素因数分解:

$3^1\times 5^3\times {\mathrm{11}}^1\times {\mathrm{5281}}^1$

素因数の和:5310

約数の個数: 32

約数和(自身を含む): 39551616

約数和(自身を除く): 17767491

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 125, 165, 275, 375, 825, 1375, 4125, 5281, 15843, 26405, 58091, 79215, 132025, 174273, 290455, 396075, 660125, 871365, 1452275, 1980375, 4356825, 7261375, 21784125]

約数ペア:

[(1, 21784125), (3, 7261375), (5, 4356825), (11, 1980375), (15, 1452275), (25, 871365), (33, 660125), (55, 396075), (75, 290455), (125, 174273), (165, 132025), (275, 79215), (375, 58091), (825, 26405), (1375, 15843), (4125, 5281)]