21211719

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{5563}}^1$

素因数の和:5638

約数の個数: 16

約数和(自身を含む): 29912064

約数和(自身を除く): 8700345

約数列:

[1, 3, 31, 41, 93, 123, 1271, 3813, 5563, 16689, 172453, 228083, 517359, 684249, 7070573, 21211719]

約数ペア:

[(1, 21211719), (3, 7070573), (31, 684249), (41, 517359), (93, 228083), (123, 172453), (1271, 16689), (3813, 5563)]