28220725

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1223}}^1$

素因数の和:1317

約数の個数: 24

約数和(自身を含む): 38247552

約数和(自身を除く): 10026827

約数列:

[1, 5, 13, 25, 65, 71, 325, 355, 923, 1223, 1775, 4615, 6115, 15899, 23075, 30575, 79495, 86833, 397475, 434165, 1128829, 2170825, 5644145, 28220725]

約数ペア:

[(1, 28220725), (5, 5644145), (13, 2170825), (25, 1128829), (65, 434165), (71, 397475), (325, 86833), (355, 79495), (923, 30575), (1223, 23075), (1775, 15899), (4615, 6115)]