21879788

素因数分解:

$2^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{107}}^1\times {\mathrm{109}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 45239040

約数和(自身を除く): 23359252

約数列:

[1, 2, 4, 7, 14, 28, 67, 107, 109, 134, 214, 218, 268, 428, 436, 469, 749, 763, 938, 1498, 1526, 1876, 2996, 3052, 7169, 7303, 11663, 14338, 14606, 23326, 28676, 29212, 46652, 50183, 51121, 81641, 100366, 102242, 163282, 200732, 204484, 326564, 781421, 1562842, 3125684, 5469947, 10939894, 21879788]

約数ペア:

[(1, 21879788), (2, 10939894), (4, 5469947), (7, 3125684), (14, 1562842), (28, 781421), (67, 326564), (107, 204484), (109, 200732), (134, 163282), (214, 102242), (218, 100366), (268, 81641), (428, 51121), (436, 50183), (469, 46652), (749, 29212), (763, 28676), (938, 23326), (1498, 14606), (1526, 14338), (1876, 11663), (2996, 7303), (3052, 7169)]