21906760

素因数分解:

$2^3\times 5^1\times {\mathrm{281}}^1\times {\mathrm{1949}}^1$

素因数の和:2241

約数の個数: 32

約数和(自身を含む): 49491000

約数和(自身を除く): 27584240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 281, 562, 1124, 1405, 1949, 2248, 2810, 3898, 5620, 7796, 9745, 11240, 15592, 19490, 38980, 77960, 547669, 1095338, 2190676, 2738345, 4381352, 5476690, 10953380, 21906760]

約数ペア:

[(1, 21906760), (2, 10953380), (4, 5476690), (5, 4381352), (8, 2738345), (10, 2190676), (20, 1095338), (40, 547669), (281, 77960), (562, 38980), (1124, 19490), (1405, 15592), (1949, 11240), (2248, 9745), (2810, 7796), (3898, 5620)]