12981995

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 17781120

約数和(自身を除く): 4799125

約数列:

[1, 5, 13, 29, 65, 71, 97, 145, 355, 377, 485, 923, 1261, 1885, 2059, 2813, 4615, 6305, 6887, 10295, 14065, 26767, 34435, 36569, 89531, 133835, 182845, 199723, 447655, 998615, 2596399, 12981995]

約数ペア:

[(1, 12981995), (5, 2596399), (13, 998615), (29, 447655), (65, 199723), (71, 182845), (97, 133835), (145, 89531), (355, 36569), (377, 34435), (485, 26767), (923, 14065), (1261, 10295), (1885, 6887), (2059, 6305), (2813, 4615)]