20957085

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{181}}^1$

素因数の和:306

約数の個数: 48

約数和(自身を含む): 38158848

約数和(自身を除く): 17201763

約数列:

[1, 3, 5, 9, 15, 31, 45, 83, 93, 155, 181, 249, 279, 415, 465, 543, 747, 905, 1245, 1395, 1629, 2573, 2715, 3735, 5611, 7719, 8145, 12865, 15023, 16833, 23157, 28055, 38595, 45069, 50499, 75115, 84165, 115785, 135207, 225345, 252495, 465713, 676035, 1397139, 2328565, 4191417, 6985695, 20957085]

約数ペア:

[(1, 20957085), (3, 6985695), (5, 4191417), (9, 2328565), (15, 1397139), (31, 676035), (45, 465713), (83, 252495), (93, 225345), (155, 135207), (181, 115785), (249, 84165), (279, 75115), (415, 50499), (465, 45069), (543, 38595), (747, 28055), (905, 23157), (1245, 16833), (1395, 15023), (1629, 12865), (2573, 8145), (2715, 7719), (3735, 5611)]