21205784

素因数分解:

$2^3\times {\mathrm{683}}^1\times {\mathrm{3881}}^1$

素因数の和:4570

約数の個数: 16

約数和(自身を含む): 39829320

約数和(自身を除く): 18623536

約数列:

[1, 2, 4, 8, 683, 1366, 2732, 3881, 5464, 7762, 15524, 31048, 2650723, 5301446, 10602892, 21205784]

約数ペア:

[(1, 21205784), (2, 10602892), (4, 5301446), (8, 2650723), (683, 31048), (1366, 15524), (2732, 7762), (3881, 5464)]