18852760

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{733}}^1$

素因数の和:1387

約数の個数: 32

約数和(自身を含む): 42542640

約数和(自身を除く): 23689880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 733, 1286, 1466, 2572, 2932, 3215, 3665, 5144, 5864, 6430, 7330, 12860, 14660, 25720, 29320, 471319, 942638, 1885276, 2356595, 3770552, 4713190, 9426380, 18852760]

約数ペア:

[(1, 18852760), (2, 9426380), (4, 4713190), (5, 3770552), (8, 2356595), (10, 1885276), (20, 942638), (40, 471319), (643, 29320), (733, 25720), (1286, 14660), (1466, 12860), (2572, 7330), (2932, 6430), (3215, 5864), (3665, 5144)]