21519645

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{311}}^1\times {\mathrm{659}}^1$

素因数の和:985

約数の個数: 32

約数和(自身を含む): 39536640

約数和(自身を除く): 18016995

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 311, 659, 933, 1555, 1977, 2177, 3295, 4613, 4665, 6531, 9885, 10885, 13839, 23065, 32655, 69195, 204949, 614847, 1024745, 1434643, 3074235, 4303929, 7173215, 21519645]

約数ペア:

[(1, 21519645), (3, 7173215), (5, 4303929), (7, 3074235), (15, 1434643), (21, 1024745), (35, 614847), (105, 204949), (311, 69195), (659, 32655), (933, 23065), (1555, 13839), (1977, 10885), (2177, 9885), (3295, 6531), (4613, 4665)]