28182380

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1\times {\mathrm{199}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 60916800

約数和(自身を除く): 32734420

約数列:

[1, 2, 4, 5, 10, 20, 73, 97, 146, 194, 199, 292, 365, 388, 398, 485, 730, 796, 970, 995, 1460, 1940, 1990, 3980, 7081, 14162, 14527, 19303, 28324, 29054, 35405, 38606, 58108, 70810, 72635, 77212, 96515, 141620, 145270, 193030, 290540, 386060, 1409119, 2818238, 5636476, 7045595, 14091190, 28182380]

約数ペア:

[(1, 28182380), (2, 14091190), (4, 7045595), (5, 5636476), (10, 2818238), (20, 1409119), (73, 386060), (97, 290540), (146, 193030), (194, 145270), (199, 141620), (292, 96515), (365, 77212), (388, 72635), (398, 70810), (485, 58108), (730, 38606), (796, 35405), (970, 29054), (995, 28324), (1460, 19303), (1940, 14527), (1990, 14162), (3980, 7081)]