20757737

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{233}}^1$

素因数の和:353

約数の個数: 32

約数和(自身を含む): 28304640

約数和(自身を除く): 7546903

約数列:

[1, 7, 11, 13, 77, 89, 91, 143, 233, 623, 979, 1001, 1157, 1631, 2563, 3029, 6853, 8099, 12727, 17941, 20737, 21203, 33319, 89089, 145159, 228107, 233233, 269581, 1596749, 1887067, 2965391, 20757737]

約数ペア:

[(1, 20757737), (7, 2965391), (11, 1887067), (13, 1596749), (77, 269581), (89, 233233), (91, 228107), (143, 145159), (233, 89089), (623, 33319), (979, 21203), (1001, 20737), (1157, 17941), (1631, 12727), (2563, 8099), (3029, 6853)]