21628040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{77243}}^1$

素因数の和:77261

約数の個数: 32

約数和(自身を含む): 55615680

約数和(自身を除く): 33987640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 77243, 154486, 308972, 386215, 540701, 617944, 772430, 1081402, 1544860, 2162804, 2703505, 3089720, 4325608, 5407010, 10814020, 21628040]

約数ペア:

[(1, 21628040), (2, 10814020), (4, 5407010), (5, 4325608), (7, 3089720), (8, 2703505), (10, 2162804), (14, 1544860), (20, 1081402), (28, 772430), (35, 617944), (40, 540701), (56, 386215), (70, 308972), (140, 154486), (280, 77243)]