28139360

素因数分解:

$2^5\times 5^1\times {\mathrm{397}}^1\times {\mathrm{443}}^1$

素因数の和:855

約数の個数: 48

約数和(自身を含む): 66797136

約数和(自身を除く): 38657776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 397, 443, 794, 886, 1588, 1772, 1985, 2215, 3176, 3544, 3970, 4430, 6352, 7088, 7940, 8860, 12704, 14176, 15880, 17720, 31760, 35440, 63520, 70880, 175871, 351742, 703484, 879355, 1406968, 1758710, 2813936, 3517420, 5627872, 7034840, 14069680, 28139360]

約数ペア:

[(1, 28139360), (2, 14069680), (4, 7034840), (5, 5627872), (8, 3517420), (10, 2813936), (16, 1758710), (20, 1406968), (32, 879355), (40, 703484), (80, 351742), (160, 175871), (397, 70880), (443, 63520), (794, 35440), (886, 31760), (1588, 17720), (1772, 15880), (1985, 14176), (2215, 12704), (3176, 8860), (3544, 7940), (3970, 7088), (4430, 6352)]