21081640

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{27739}}^1$

素因数の和:27769

約数の個数: 32

約数和(自身を含む): 49932000

約数和(自身を除く): 28850360

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 27739, 55478, 110956, 138695, 221912, 277390, 527041, 554780, 1054082, 1109560, 2108164, 2635205, 4216328, 5270410, 10540820, 21081640]

約数ペア:

[(1, 21081640), (2, 10540820), (4, 5270410), (5, 4216328), (8, 2635205), (10, 2108164), (19, 1109560), (20, 1054082), (38, 554780), (40, 527041), (76, 277390), (95, 221912), (152, 138695), (190, 110956), (380, 55478), (760, 27739)]