20004040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71443}}^1$

素因数の和:71461

約数の個数: 32

約数和(自身を含む): 51439680

約数和(自身を除く): 31435640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 71443, 142886, 285772, 357215, 500101, 571544, 714430, 1000202, 1428860, 2000404, 2500505, 2857720, 4000808, 5001010, 10002020, 20004040]

約数ペア:

[(1, 20004040), (2, 10002020), (4, 5001010), (5, 4000808), (7, 2857720), (8, 2500505), (10, 2000404), (14, 1428860), (20, 1000202), (28, 714430), (35, 571544), (40, 500101), (56, 357215), (70, 285772), (140, 142886), (280, 71443)]