18870920

素因数分解:

$2^3\times 5^1\times {\mathrm{673}}^1\times {\mathrm{701}}^1$

素因数の和:1385

約数の個数: 32

約数和(自身を含む): 42583320

約数和(自身を除く): 23712400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 673, 701, 1346, 1402, 2692, 2804, 3365, 3505, 5384, 5608, 6730, 7010, 13460, 14020, 26920, 28040, 471773, 943546, 1887092, 2358865, 3774184, 4717730, 9435460, 18870920]

約数ペア:

[(1, 18870920), (2, 9435460), (4, 4717730), (5, 3774184), (8, 2358865), (10, 1887092), (20, 943546), (40, 471773), (673, 28040), (701, 26920), (1346, 14020), (1402, 13460), (2692, 7010), (2804, 6730), (3365, 5608), (3505, 5384)]