21830440

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{1361}}^1$

素因数の和:1773

約数の個数: 32

約数和(自身を含む): 49277160

約数和(自身を除く): 27446720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1361, 1604, 2005, 2722, 3208, 4010, 5444, 6805, 8020, 10888, 13610, 16040, 27220, 54440, 545761, 1091522, 2183044, 2728805, 4366088, 5457610, 10915220, 21830440]

約数ペア:

[(1, 21830440), (2, 10915220), (4, 5457610), (5, 4366088), (8, 2728805), (10, 2183044), (20, 1091522), (40, 545761), (401, 54440), (802, 27220), (1361, 16040), (1604, 13610), (2005, 10888), (2722, 8020), (3208, 6805), (4010, 5444)]