20428520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{72959}}^1$

素因数の和:72977

約数の個数: 32

約数和(自身を含む): 52531200

約数和(自身を除く): 32102680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 72959, 145918, 291836, 364795, 510713, 583672, 729590, 1021426, 1459180, 2042852, 2553565, 2918360, 4085704, 5107130, 10214260, 20428520]

約数ペア:

[(1, 20428520), (2, 10214260), (4, 5107130), (5, 4085704), (7, 2918360), (8, 2553565), (10, 2042852), (14, 1459180), (20, 1021426), (28, 729590), (35, 583672), (40, 510713), (56, 364795), (70, 291836), (140, 145918), (280, 72959)]