20901855

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2897}}^1$

素因数の和:2955

約数の個数: 32

約数和(自身を含む): 37001664

約数和(自身を除く): 16099809

約数列:

[1, 3, 5, 13, 15, 37, 39, 65, 111, 185, 195, 481, 555, 1443, 2405, 2897, 7215, 8691, 14485, 37661, 43455, 107189, 112983, 188305, 321567, 535945, 564915, 1393457, 1607835, 4180371, 6967285, 20901855]

約数ペア:

[(1, 20901855), (3, 6967285), (5, 4180371), (13, 1607835), (15, 1393457), (37, 564915), (39, 535945), (65, 321567), (111, 188305), (185, 112983), (195, 107189), (481, 43455), (555, 37661), (1443, 14485), (2405, 8691), (2897, 7215)]