20931855

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{311}}^1\times {\mathrm{641}}^1$

素因数の和:967

約数の個数: 32

約数和(自身を含む): 38458368

約数和(自身を除く): 17526513

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 311, 641, 933, 1555, 1923, 2177, 3205, 4487, 4665, 6531, 9615, 10885, 13461, 22435, 32655, 67305, 199351, 598053, 996755, 1395457, 2990265, 4186371, 6977285, 20931855]

約数ペア:

[(1, 20931855), (3, 6977285), (5, 4186371), (7, 2990265), (15, 1395457), (21, 996755), (35, 598053), (105, 199351), (311, 67305), (641, 32655), (933, 22435), (1555, 13461), (1923, 10885), (2177, 9615), (3205, 6531), (4487, 4665)]