21112490

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{1531}}^1$

素因数の和:1742

約数の個数: 32

約数和(自身を含む): 43680384

約数和(自身を除く): 22567894

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 197, 394, 985, 1379, 1531, 1970, 2758, 3062, 6895, 7655, 10717, 13790, 15310, 21434, 53585, 107170, 301607, 603214, 1508035, 2111249, 3016070, 4222498, 10556245, 21112490]

約数ペア:

[(1, 21112490), (2, 10556245), (5, 4222498), (7, 3016070), (10, 2111249), (14, 1508035), (35, 603214), (70, 301607), (197, 107170), (394, 53585), (985, 21434), (1379, 15310), (1531, 13790), (1970, 10717), (2758, 7655), (3062, 6895)]