20721701

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{163}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 28213248

約数和(自身を除く): 7491547

約数列:

[1, 7, 11, 13, 77, 91, 127, 143, 163, 889, 1001, 1141, 1397, 1651, 1793, 2119, 9779, 11557, 12551, 14833, 18161, 20701, 23309, 127127, 144907, 163163, 227711, 269113, 1593977, 1883791, 2960243, 20721701]

約数ペア:

[(1, 20721701), (7, 2960243), (11, 1883791), (13, 1593977), (77, 269113), (91, 227711), (127, 163163), (143, 144907), (163, 127127), (889, 23309), (1001, 20701), (1141, 18161), (1397, 14833), (1651, 12551), (1793, 11557), (2119, 9779)]