20317899

素因数分解:

$3^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{1553}}^1$

素因数の和:1659

約数の個数: 24

約数和(自身を含む): 31888080

約数和(自身を除く): 11570181

約数列:

[1, 3, 7, 21, 49, 89, 147, 267, 623, 1553, 1869, 4361, 4659, 10871, 13083, 32613, 76097, 138217, 228291, 414651, 967519, 2902557, 6772633, 20317899]

約数ペア:

[(1, 20317899), (3, 6772633), (7, 2902557), (21, 967519), (49, 414651), (89, 228291), (147, 138217), (267, 76097), (623, 32613), (1553, 13083), (1869, 10871), (4361, 4659)]