20996620

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 45440640

約数和(自身を除く): 24444020

約数列:

[1, 2, 4, 5, 10, 20, 79, 97, 137, 158, 194, 274, 316, 388, 395, 485, 548, 685, 790, 970, 1370, 1580, 1940, 2740, 7663, 10823, 13289, 15326, 21646, 26578, 30652, 38315, 43292, 53156, 54115, 66445, 76630, 108230, 132890, 153260, 216460, 265780, 1049831, 2099662, 4199324, 5249155, 10498310, 20996620]

約数ペア:

[(1, 20996620), (2, 10498310), (4, 5249155), (5, 4199324), (10, 2099662), (20, 1049831), (79, 265780), (97, 216460), (137, 153260), (158, 132890), (194, 108230), (274, 76630), (316, 66445), (388, 54115), (395, 53156), (485, 43292), (548, 38315), (685, 30652), (790, 26578), (970, 21646), (1370, 15326), (1580, 13289), (1940, 10823), (2740, 7663)]