18495980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{10391}}^1$

素因数の和:10489

約数の個数: 24

約数和(自身を含む): 39281760

約数和(自身を除く): 20785780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 10391, 20782, 41564, 51955, 103910, 207820, 924799, 1849598, 3699196, 4623995, 9247990, 18495980]

約数ペア:

[(1, 18495980), (2, 9247990), (4, 4623995), (5, 3699196), (10, 1849598), (20, 924799), (89, 207820), (178, 103910), (356, 51955), (445, 41564), (890, 20782), (1780, 10391)]