21756920

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{7451}}^1$

素因数の和:7535

約数の個数: 32

約数和(自身を含む): 49630320

約数和(自身を除く): 27873400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 7451, 14902, 29804, 37255, 59608, 74510, 149020, 298040, 543923, 1087846, 2175692, 2719615, 4351384, 5439230, 10878460, 21756920]

約数ペア:

[(1, 21756920), (2, 10878460), (4, 5439230), (5, 4351384), (8, 2719615), (10, 2175692), (20, 1087846), (40, 543923), (73, 298040), (146, 149020), (292, 74510), (365, 59608), (584, 37255), (730, 29804), (1460, 14902), (2920, 7451)]