21000929450

素因数分解:

$2^1\times 5^2\times {\mathrm{79}}^1\times {\mathrm{419}}^1\times {\mathrm{12689}}^1$

素因数の和:13199

約数の個数: 48

約数和(自身を含む): 39653712000

約数和(自身を除く): 18652782550

約数列:

[1, 2, 5, 10, 25, 50, 79, 158, 395, 419, 790, 838, 1975, 2095, 3950, 4190, 10475, 12689, 20950, 25378, 33101, 63445, 66202, 126890, 165505, 317225, 331010, 634450, 827525, 1002431, 1655050, 2004862, 5012155, 5316691, 10024310, 10633382, 25060775, 26583455, 50121550, 53166910, 132917275, 265834550, 420018589, 840037178, 2100092945, 4200185890, 10500464725, 21000929450]

約数ペア:

[(1, 21000929450), (2, 10500464725), (5, 4200185890), (10, 2100092945), (25, 840037178), (50, 420018589), (79, 265834550), (158, 132917275), (395, 53166910), (419, 50121550), (790, 26583455), (838, 25060775), (1975, 10633382), (2095, 10024310), (3950, 5316691), (4190, 5012155), (10475, 2004862), (12689, 1655050), (20950, 1002431), (25378, 827525), (33101, 634450), (63445, 331010), (66202, 317225), (126890, 165505)]