21221240

素因数分解:

$2^3\times 5^1\times {\mathrm{530531}}^1$

素因数の和:530542

約数の個数: 16

約数和(自身を含む): 47747880

約数和(自身を除く): 26526640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 530531, 1061062, 2122124, 2652655, 4244248, 5305310, 10610620, 21221240]

約数ペア:

[(1, 21221240), (2, 10610620), (4, 5305310), (5, 4244248), (8, 2652655), (10, 2122124), (20, 1061062), (40, 530531)]