18220405

素因数分解:

$5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{2399}}^1$

素因数の和:2449

約数の個数: 24

約数和(自身を含む): 26265600

約数和(自身を除く): 8045195

約数列:

[1, 5, 7, 31, 35, 49, 155, 217, 245, 1085, 1519, 2399, 7595, 11995, 16793, 74369, 83965, 117551, 371845, 520583, 587755, 2602915, 3644081, 18220405]

約数ペア:

[(1, 18220405), (5, 3644081), (7, 2602915), (31, 587755), (35, 520583), (49, 371845), (155, 117551), (217, 83965), (245, 74369), (1085, 16793), (1519, 11995), (2399, 7595)]