21389390

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{337}}^1\times {\mathrm{577}}^1$

素因数の和:932

約数の個数: 32

約数和(自身を含む): 42198624

約数和(自身を除く): 20809234

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 337, 577, 674, 1154, 1685, 2885, 3370, 3707, 5770, 6347, 7414, 12694, 18535, 31735, 37070, 63470, 194449, 388898, 972245, 1944490, 2138939, 4277878, 10694695, 21389390]

約数ペア:

[(1, 21389390), (2, 10694695), (5, 4277878), (10, 2138939), (11, 1944490), (22, 972245), (55, 388898), (110, 194449), (337, 63470), (577, 37070), (674, 31735), (1154, 18535), (1685, 12694), (2885, 7414), (3370, 6347), (3707, 5770)]