21287607

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{20809}}^1$

素因数の和:20854

約数の個数: 16

約数和(自身を含む): 31964160

約数和(自身を除く): 10676553

約数列:

[1, 3, 11, 31, 33, 93, 341, 1023, 20809, 62427, 228899, 645079, 686697, 1935237, 7095869, 21287607]

約数ペア:

[(1, 21287607), (3, 7095869), (11, 1935237), (31, 686697), (33, 645079), (93, 228899), (341, 62427), (1023, 20809)]