21905090

素因数分解:

$2^1\times 5^1\times {\mathrm{541}}^1\times {\mathrm{4049}}^1$

素因数の和:4597

約数の個数: 16

約数和(自身を含む): 39511800

約数和(自身を除く): 17606710

約数列:

[1, 2, 5, 10, 541, 1082, 2705, 4049, 5410, 8098, 20245, 40490, 2190509, 4381018, 10952545, 21905090]

約数ペア:

[(1, 21905090), (2, 10952545), (5, 4381018), (10, 2190509), (541, 40490), (1082, 20245), (2705, 8098), (4049, 5410)]