18621560

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4271}}^1$

素因数の和:4391

約数の個数: 32

約数和(自身を含む): 42292800

約数和(自身を除く): 23671240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4271, 4360, 8542, 17084, 21355, 34168, 42710, 85420, 170840, 465539, 931078, 1862156, 2327695, 3724312, 4655390, 9310780, 18621560]

約数ペア:

[(1, 18621560), (2, 9310780), (4, 4655390), (5, 3724312), (8, 2327695), (10, 1862156), (20, 931078), (40, 465539), (109, 170840), (218, 85420), (436, 42710), (545, 34168), (872, 21355), (1090, 17084), (2180, 8542), (4271, 4360)]