21490196

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1373}}^1$

素因数の和:1440

約数の個数: 48

約数和(自身を含む): 47397504

約数和(自身を除く): 25907308

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 43, 52, 86, 91, 172, 182, 301, 364, 559, 602, 1118, 1204, 1373, 2236, 2746, 3913, 5492, 7826, 9611, 15652, 17849, 19222, 35698, 38444, 59039, 71396, 118078, 124943, 236156, 249886, 413273, 499772, 767507, 826546, 1535014, 1653092, 3070028, 5372549, 10745098, 21490196]

約数ペア:

[(1, 21490196), (2, 10745098), (4, 5372549), (7, 3070028), (13, 1653092), (14, 1535014), (26, 826546), (28, 767507), (43, 499772), (52, 413273), (86, 249886), (91, 236156), (172, 124943), (182, 118078), (301, 71396), (364, 59039), (559, 38444), (602, 35698), (1118, 19222), (1204, 17849), (1373, 15652), (2236, 9611), (2746, 7826), (3913, 5492)]