21232660

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{197}}^1\times {\mathrm{317}}^1$

素因数の和:540

約数の個数: 48

約数和(自身を含む): 47600784

約数和(自身を除く): 26368124

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 197, 317, 340, 394, 634, 788, 985, 1268, 1585, 1970, 3170, 3349, 3940, 5389, 6340, 6698, 10778, 13396, 16745, 21556, 26945, 33490, 53890, 62449, 66980, 107780, 124898, 249796, 312245, 624490, 1061633, 1248980, 2123266, 4246532, 5308165, 10616330, 21232660]

約数ペア:

[(1, 21232660), (2, 10616330), (4, 5308165), (5, 4246532), (10, 2123266), (17, 1248980), (20, 1061633), (34, 624490), (68, 312245), (85, 249796), (170, 124898), (197, 107780), (317, 66980), (340, 62449), (394, 53890), (634, 33490), (788, 26945), (985, 21556), (1268, 16745), (1585, 13396), (1970, 10778), (3170, 6698), (3349, 6340), (3940, 5389)]