28120071

素因数分解:

$3^1\times 7^2\times {\mathrm{233}}^1\times {\mathrm{821}}^1$

素因数の和:1071

約数の個数: 24

約数和(自身を含む): 43855344

約数和(自身を除く): 15735273

約数列:

[1, 3, 7, 21, 49, 147, 233, 699, 821, 1631, 2463, 4893, 5747, 11417, 17241, 34251, 40229, 120687, 191293, 573879, 1339051, 4017153, 9373357, 28120071]

約数ペア:

[(1, 28120071), (3, 9373357), (7, 4017153), (21, 1339051), (49, 573879), (147, 191293), (233, 120687), (699, 40229), (821, 34251), (1631, 17241), (2463, 11417), (4893, 5747)]