20402487

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{5309}}^1$

素因数の和:5383

約数の個数: 24

約数和(自身を含む): 34238880

約数和(自身を除く): 13836393

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 5309, 15927, 37163, 47781, 111489, 323849, 334467, 971547, 2266943, 2914641, 6800829, 20402487]

約数ペア:

[(1, 20402487), (3, 6800829), (7, 2914641), (9, 2266943), (21, 971547), (61, 334467), (63, 323849), (183, 111489), (427, 47781), (549, 37163), (1281, 15927), (3843, 5309)]