66786920

素因数分解:

$2^3\times 5^1\times {\mathrm{1039}}^1\times {\mathrm{1607}}^1$

素因数の和:2657

約数の個数: 32

約数和(自身を含む): 150508800

約数和(自身を除く): 83721880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1039, 1607, 2078, 3214, 4156, 5195, 6428, 8035, 8312, 10390, 12856, 16070, 20780, 32140, 41560, 64280, 1669673, 3339346, 6678692, 8348365, 13357384, 16696730, 33393460, 66786920]

約数ペア:

[(1, 66786920), (2, 33393460), (4, 16696730), (5, 13357384), (8, 8348365), (10, 6678692), (20, 3339346), (40, 1669673), (1039, 64280), (1607, 41560), (2078, 32140), (3214, 20780), (4156, 16070), (5195, 12856), (6428, 10390), (8035, 8312)]