21052640

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{18797}}^1$

素因数の和:18819

約数の個数: 48

約数和(自身を含む): 56845152

約数和(自身を除く): 35792512

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 18797, 37594, 75188, 93985, 131579, 150376, 187970, 263158, 300752, 375940, 526316, 601504, 657895, 751880, 1052632, 1315790, 1503760, 2105264, 2631580, 3007520, 4210528, 5263160, 10526320, 21052640]

約数ペア:

[(1, 21052640), (2, 10526320), (4, 5263160), (5, 4210528), (7, 3007520), (8, 2631580), (10, 2105264), (14, 1503760), (16, 1315790), (20, 1052632), (28, 751880), (32, 657895), (35, 601504), (40, 526316), (56, 375940), (70, 300752), (80, 263158), (112, 187970), (140, 150376), (160, 131579), (224, 93985), (280, 75188), (560, 37594), (1120, 18797)]