18040700

素因数分解:

$2^2\times 5^2\times {\mathrm{223}}^1\times {\mathrm{809}}^1$

素因数の和:1046

約数の個数: 36

約数和(自身を含む): 39372480

約数和(自身を除く): 21331780

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 223, 446, 809, 892, 1115, 1618, 2230, 3236, 4045, 4460, 5575, 8090, 11150, 16180, 20225, 22300, 40450, 80900, 180407, 360814, 721628, 902035, 1804070, 3608140, 4510175, 9020350, 18040700]

約数ペア:

[(1, 18040700), (2, 9020350), (4, 4510175), (5, 3608140), (10, 1804070), (20, 902035), (25, 721628), (50, 360814), (100, 180407), (223, 80900), (446, 40450), (809, 22300), (892, 20225), (1115, 16180), (1618, 11150), (2230, 8090), (3236, 5575), (4045, 4460)]