20997676

素因数分解:

$2^2\times 7^2\times {\mathrm{149}}^1\times {\mathrm{719}}^1$

素因数の和:886

約数の個数: 36

約数和(自身を含む): 43092000

約数和(自身を除く): 22094324

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 149, 196, 298, 596, 719, 1043, 1438, 2086, 2876, 4172, 5033, 7301, 10066, 14602, 20132, 29204, 35231, 70462, 107131, 140924, 214262, 428524, 749917, 1499834, 2999668, 5249419, 10498838, 20997676]

約数ペア:

[(1, 20997676), (2, 10498838), (4, 5249419), (7, 2999668), (14, 1499834), (28, 749917), (49, 428524), (98, 214262), (149, 140924), (196, 107131), (298, 70462), (596, 35231), (719, 29204), (1043, 20132), (1438, 14602), (2086, 10066), (2876, 7301), (4172, 5033)]