21620804

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{2917}}^1$

素因数の和:3047

約数の個数: 24

約数和(自身を含む): 40443480

約数和(自身を除く): 18822676

約数列:

[1, 2, 4, 17, 34, 68, 109, 218, 436, 1853, 2917, 3706, 5834, 7412, 11668, 49589, 99178, 198356, 317953, 635906, 1271812, 5405201, 10810402, 21620804]

約数ペア:

[(1, 21620804), (2, 10810402), (4, 5405201), (17, 1271812), (34, 635906), (68, 317953), (109, 198356), (218, 99178), (436, 49589), (1853, 11668), (2917, 7412), (3706, 5834)]