19082980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4397}}^1$

素因数の和:4444

約数の個数: 48

約数和(自身を含む): 47287296

約数和(自身を除く): 28204316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4340, 4397, 8794, 17588, 21985, 30779, 43970, 61558, 87940, 123116, 136307, 153895, 272614, 307790, 545228, 615580, 681535, 954149, 1363070, 1908298, 2726140, 3816596, 4770745, 9541490, 19082980]

約数ペア:

[(1, 19082980), (2, 9541490), (4, 4770745), (5, 3816596), (7, 2726140), (10, 1908298), (14, 1363070), (20, 954149), (28, 681535), (31, 615580), (35, 545228), (62, 307790), (70, 272614), (124, 153895), (140, 136307), (155, 123116), (217, 87940), (310, 61558), (434, 43970), (620, 30779), (868, 21985), (1085, 17588), (2170, 8794), (4340, 4397)]