20197749

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{89}}^1$

素因数の和:162

約数の個数: 48

約数和(自身を含む): 33445440

約数和(自身を除く): 13247691

約数列:

[1, 3, 11, 13, 23, 33, 39, 69, 89, 143, 253, 267, 299, 429, 529, 759, 897, 979, 1157, 1587, 2047, 2937, 3289, 3471, 5819, 6141, 6877, 9867, 12727, 17457, 20631, 22517, 26611, 38181, 47081, 67551, 75647, 79833, 141243, 226941, 292721, 517891, 612053, 878163, 1553673, 1836159, 6732583, 20197749]

約数ペア:

[(1, 20197749), (3, 6732583), (11, 1836159), (13, 1553673), (23, 878163), (33, 612053), (39, 517891), (69, 292721), (89, 226941), (143, 141243), (253, 79833), (267, 75647), (299, 67551), (429, 47081), (529, 38181), (759, 26611), (897, 22517), (979, 20631), (1157, 17457), (1587, 12727), (2047, 9867), (2937, 6877), (3289, 6141), (3471, 5819)]