19990020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{317}}^1\times {\mathrm{1051}}^1$

素因数の和:1380

約数の個数: 48

約数和(自身を含む): 56202048

約数和(自身を除く): 36212028

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 317, 634, 951, 1051, 1268, 1585, 1902, 2102, 3153, 3170, 3804, 4204, 4755, 5255, 6306, 6340, 9510, 10510, 12612, 15765, 19020, 21020, 31530, 63060, 333167, 666334, 999501, 1332668, 1665835, 1999002, 3331670, 3998004, 4997505, 6663340, 9995010, 19990020]

約数ペア:

[(1, 19990020), (2, 9995010), (3, 6663340), (4, 4997505), (5, 3998004), (6, 3331670), (10, 1999002), (12, 1665835), (15, 1332668), (20, 999501), (30, 666334), (60, 333167), (317, 63060), (634, 31530), (951, 21020), (1051, 19020), (1268, 15765), (1585, 12612), (1902, 10510), (2102, 9510), (3153, 6340), (3170, 6306), (3804, 5255), (4204, 4755)]