21054640

素因数分解:

$2^4\times 5^1\times {\mathrm{263183}}^1$

素因数の和:263196

約数の個数: 20

約数和(自身を含む): 48952224

約数和(自身を除く): 27897584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263183, 526366, 1052732, 1315915, 2105464, 2631830, 4210928, 5263660, 10527320, 21054640]

約数ペア:

[(1, 21054640), (2, 10527320), (4, 5263660), (5, 4210928), (8, 2631830), (10, 2105464), (16, 1315915), (20, 1052732), (40, 526366), (80, 263183)]