20975565

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{409}}^1$

素因数の和:693

約数の個数: 32

約数和(自身を含む): 36368640

約数和(自身を除く): 15393075

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 263, 409, 789, 1227, 1315, 2045, 3419, 3945, 5317, 6135, 10257, 15951, 17095, 26585, 51285, 79755, 107567, 322701, 537835, 1398371, 1613505, 4195113, 6991855, 20975565]

約数ペア:

[(1, 20975565), (3, 6991855), (5, 4195113), (13, 1613505), (15, 1398371), (39, 537835), (65, 322701), (195, 107567), (263, 79755), (409, 51285), (789, 26585), (1227, 17095), (1315, 15951), (2045, 10257), (3419, 6135), (3945, 5317)]