18457840

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{4909}}^1$

素因数の和:4969

約数の個数: 40

約数和(自身を含む): 43836480

約数和(自身を除く): 25378640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 80, 94, 188, 235, 376, 470, 752, 940, 1880, 3760, 4909, 9818, 19636, 24545, 39272, 49090, 78544, 98180, 196360, 230723, 392720, 461446, 922892, 1153615, 1845784, 2307230, 3691568, 4614460, 9228920, 18457840]

約数ペア:

[(1, 18457840), (2, 9228920), (4, 4614460), (5, 3691568), (8, 2307230), (10, 1845784), (16, 1153615), (20, 922892), (40, 461446), (47, 392720), (80, 230723), (94, 196360), (188, 98180), (235, 78544), (376, 49090), (470, 39272), (752, 24545), (940, 19636), (1880, 9818), (3760, 4909)]