21895185

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{2389}}^1$

素因数の和:2457

約数の個数: 32

約数和(自身を含む): 38545920

約数和(自身を除く): 16650735

約数列:

[1, 3, 5, 13, 15, 39, 47, 65, 141, 195, 235, 611, 705, 1833, 2389, 3055, 7167, 9165, 11945, 31057, 35835, 93171, 112283, 155285, 336849, 465855, 561415, 1459679, 1684245, 4379037, 7298395, 21895185]

約数ペア:

[(1, 21895185), (3, 7298395), (5, 4379037), (13, 1684245), (15, 1459679), (39, 561415), (47, 465855), (65, 336849), (141, 155285), (195, 112283), (235, 93171), (611, 35835), (705, 31057), (1833, 11945), (2389, 9165), (3055, 7167)]