21088180

素因数分解:

$2^2\times 5^1\times {\mathrm{541}}^1\times {\mathrm{1949}}^1$

素因数の和:2499

約数の個数: 24

約数和(自身を含む): 44389800

約数和(自身を除く): 23301620

約数列:

[1, 2, 4, 5, 10, 20, 541, 1082, 1949, 2164, 2705, 3898, 5410, 7796, 9745, 10820, 19490, 38980, 1054409, 2108818, 4217636, 5272045, 10544090, 21088180]

約数ペア:

[(1, 21088180), (2, 10544090), (4, 5272045), (5, 4217636), (10, 2108818), (20, 1054409), (541, 38980), (1082, 19490), (1949, 10820), (2164, 9745), (2705, 7796), (3898, 5410)]