21806205

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{4027}}^1$

素因数の和:4073

約数の個数: 24

約数和(自身を含む): 36832032

約数和(自身を除く): 15025827

約数列:

[1, 3, 5, 15, 19, 57, 95, 285, 361, 1083, 1805, 4027, 5415, 12081, 20135, 60405, 76513, 229539, 382565, 1147695, 1453747, 4361241, 7268735, 21806205]

約数ペア:

[(1, 21806205), (3, 7268735), (5, 4361241), (15, 1453747), (19, 1147695), (57, 382565), (95, 229539), (285, 76513), (361, 60405), (1083, 20135), (1805, 12081), (4027, 5415)]