28340975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1$

素因数の和:180

約数の個数: 48

約数和(自身を含む): 40830720

約数和(自身を除く): 12489745

約数列:

[1, 5, 13, 25, 29, 31, 65, 97, 145, 155, 325, 377, 403, 485, 725, 775, 899, 1261, 1885, 2015, 2425, 2813, 3007, 4495, 6305, 9425, 10075, 11687, 14065, 15035, 22475, 31525, 36569, 39091, 58435, 70325, 75175, 87203, 182845, 195455, 292175, 436015, 914225, 977275, 1133639, 2180075, 5668195, 28340975]

約数ペア:

[(1, 28340975), (5, 5668195), (13, 2180075), (25, 1133639), (29, 977275), (31, 914225), (65, 436015), (97, 292175), (145, 195455), (155, 182845), (325, 87203), (377, 75175), (403, 70325), (485, 58435), (725, 39091), (775, 36569), (899, 31525), (1261, 22475), (1885, 15035), (2015, 14065), (2425, 11687), (2813, 10075), (3007, 9425), (4495, 6305)]