21838420

素因数分解:

$2^2\times 5^1\times {\mathrm{311}}^1\times {\mathrm{3511}}^1$

素因数の和:3831

約数の個数: 24

約数和(自身を含む): 46021248

約数和(自身を除く): 24182828

約数列:

[1, 2, 4, 5, 10, 20, 311, 622, 1244, 1555, 3110, 3511, 6220, 7022, 14044, 17555, 35110, 70220, 1091921, 2183842, 4367684, 5459605, 10919210, 21838420]

約数ペア:

[(1, 21838420), (2, 10919210), (4, 5459605), (5, 4367684), (10, 2183842), (20, 1091921), (311, 70220), (622, 35110), (1244, 17555), (1555, 14044), (3110, 7022), (3511, 6220)]