21673540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{1039}}^1$

素因数の和:1204

約数の個数: 48

約数和(自身を含む): 52416000

約数和(自身を除く): 30742460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 149, 298, 596, 745, 1039, 1043, 1490, 2078, 2086, 2980, 4156, 4172, 5195, 5215, 7273, 10390, 10430, 14546, 20780, 20860, 29092, 36365, 72730, 145460, 154811, 309622, 619244, 774055, 1083677, 1548110, 2167354, 3096220, 4334708, 5418385, 10836770, 21673540]

約数ペア:

[(1, 21673540), (2, 10836770), (4, 5418385), (5, 4334708), (7, 3096220), (10, 2167354), (14, 1548110), (20, 1083677), (28, 774055), (35, 619244), (70, 309622), (140, 154811), (149, 145460), (298, 72730), (596, 36365), (745, 29092), (1039, 20860), (1043, 20780), (1490, 14546), (2078, 10430), (2086, 10390), (2980, 7273), (4156, 5215), (4172, 5195)]