20280680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{72431}}^1$

素因数の和:72449

約数の個数: 32

約数和(自身を含む): 52151040

約数和(自身を除く): 31870360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 72431, 144862, 289724, 362155, 507017, 579448, 724310, 1014034, 1448620, 2028068, 2535085, 2897240, 4056136, 5070170, 10140340, 20280680]

約数ペア:

[(1, 20280680), (2, 10140340), (4, 5070170), (5, 4056136), (7, 2897240), (8, 2535085), (10, 2028068), (14, 1448620), (20, 1014034), (28, 724310), (35, 579448), (40, 507017), (56, 362155), (70, 289724), (140, 144862), (280, 72431)]