19181900

素因数分解:

$2^2\times 5^2\times {\mathrm{433}}^1\times {\mathrm{443}}^1$

素因数の和:890

約数の個数: 36

約数和(自身を含む): 41815032

約数和(自身を除く): 22633132

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 433, 443, 866, 886, 1732, 1772, 2165, 2215, 4330, 4430, 8660, 8860, 10825, 11075, 21650, 22150, 43300, 44300, 191819, 383638, 767276, 959095, 1918190, 3836380, 4795475, 9590950, 19181900]

約数ペア:

[(1, 19181900), (2, 9590950), (4, 4795475), (5, 3836380), (10, 1918190), (20, 959095), (25, 767276), (50, 383638), (100, 191819), (433, 44300), (443, 43300), (866, 22150), (886, 21650), (1732, 11075), (1772, 10825), (2165, 8860), (2215, 8660), (4330, 4430)]