19969580

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{1039}}^1$

素因数の和:1110

約数の個数: 36

約数和(自身を含む): 43374240

約数和(自身を除く): 23404660

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 961, 1039, 1922, 2078, 3844, 4156, 4805, 5195, 9610, 10390, 19220, 20780, 32209, 64418, 128836, 161045, 322090, 644180, 998479, 1996958, 3993916, 4992395, 9984790, 19969580]

約数ペア:

[(1, 19969580), (2, 9984790), (4, 4992395), (5, 3993916), (10, 1996958), (20, 998479), (31, 644180), (62, 322090), (124, 161045), (155, 128836), (310, 64418), (620, 32209), (961, 20780), (1039, 19220), (1922, 10390), (2078, 9610), (3844, 5195), (4156, 4805)]