1991780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{347}}^1$

素因数の和:404

約数の個数: 48

約数和(自身を含む): 4910976

約数和(自身を除く): 2919196

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 287, 347, 410, 574, 694, 820, 1148, 1388, 1435, 1735, 2429, 2870, 3470, 4858, 5740, 6940, 9716, 12145, 14227, 24290, 28454, 48580, 56908, 71135, 99589, 142270, 199178, 284540, 398356, 497945, 995890, 1991780]

約数ペア:

[(1, 1991780), (2, 995890), (4, 497945), (5, 398356), (7, 284540), (10, 199178), (14, 142270), (20, 99589), (28, 71135), (35, 56908), (41, 48580), (70, 28454), (82, 24290), (140, 14227), (164, 12145), (205, 9716), (287, 6940), (347, 5740), (410, 4858), (574, 3470), (694, 2870), (820, 2429), (1148, 1735), (1388, 1435)]