21578921

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{2857}}^1$

素因数の和:2960

約数の個数: 16

約数和(自身を含む): 26888064

約数和(自身を除く): 5309143

約数列:

[1, 7, 13, 83, 91, 581, 1079, 2857, 7553, 19999, 37141, 237131, 259987, 1659917, 3082703, 21578921]

約数ペア:

[(1, 21578921), (7, 3082703), (13, 1659917), (83, 259987), (91, 237131), (581, 37141), (1079, 19999), (2857, 7553)]