21406875

素因数分解:

$3^1\times 5^4\times 7^2\times {\mathrm{233}}^1$

素因数の和:270

約数の個数: 60

約数和(自身を含む): 41667912

約数和(自身を除く): 20261037

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 49, 75, 105, 125, 147, 175, 233, 245, 375, 525, 625, 699, 735, 875, 1165, 1225, 1631, 1875, 2625, 3495, 3675, 4375, 4893, 5825, 6125, 8155, 11417, 13125, 17475, 18375, 24465, 29125, 30625, 34251, 40775, 57085, 87375, 91875, 122325, 145625, 171255, 203875, 285425, 436875, 611625, 856275, 1019375, 1427125, 3058125, 4281375, 7135625, 21406875]

約数ペア:

[(1, 21406875), (3, 7135625), (5, 4281375), (7, 3058125), (15, 1427125), (21, 1019375), (25, 856275), (35, 611625), (49, 436875), (75, 285425), (105, 203875), (125, 171255), (147, 145625), (175, 122325), (233, 91875), (245, 87375), (375, 57085), (525, 40775), (625, 34251), (699, 30625), (735, 29125), (875, 24465), (1165, 18375), (1225, 17475), (1631, 13125), (1875, 11417), (2625, 8155), (3495, 6125), (3675, 5825), (4375, 4893)]