21992971

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{173}}^1$

素因数の和:331

約数の個数: 32

約数和(自身を含む): 29933568

約数和(自身を除く): 7940597

約数列:

[1, 7, 11, 13, 77, 91, 127, 143, 173, 889, 1001, 1211, 1397, 1651, 1903, 2249, 9779, 11557, 13321, 15743, 18161, 21971, 24739, 127127, 153797, 173173, 241681, 285623, 1691767, 1999361, 3141853, 21992971]

約数ペア:

[(1, 21992971), (7, 3141853), (11, 1999361), (13, 1691767), (77, 285623), (91, 241681), (127, 173173), (143, 153797), (173, 127127), (889, 24739), (1001, 21971), (1211, 18161), (1397, 15743), (1651, 13321), (1903, 11557), (2249, 9779)]