20470509

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{661}}^1$

素因数の和:738

約数の個数: 32

約数和(自身を含む): 32199680

約数和(自身を除く): 11729171

約数列:

[1, 3, 9, 27, 31, 37, 93, 111, 279, 333, 661, 837, 999, 1147, 1983, 3441, 5949, 10323, 17847, 20491, 24457, 30969, 61473, 73371, 184419, 220113, 553257, 660339, 758167, 2274501, 6823503, 20470509]

約数ペア:

[(1, 20470509), (3, 6823503), (9, 2274501), (27, 758167), (31, 660339), (37, 553257), (93, 220113), (111, 184419), (279, 73371), (333, 61473), (661, 30969), (837, 24457), (999, 20491), (1147, 17847), (1983, 10323), (3441, 5949)]