128791719

素因数分解:

$3^2\times 7^1\times {\mathrm{307}}^1\times {\mathrm{6659}}^1$

素因数の和:6979

約数の個数: 24

約数和(自身を含む): 213333120

約数和(自身を除く): 84541401

約数列:

[1, 3, 7, 9, 21, 63, 307, 921, 2149, 2763, 6447, 6659, 19341, 19977, 46613, 59931, 139839, 419517, 2044313, 6132939, 14310191, 18398817, 42930573, 128791719]

約数ペア:

[(1, 128791719), (3, 42930573), (7, 18398817), (9, 14310191), (21, 6132939), (63, 2044313), (307, 419517), (921, 139839), (2149, 59931), (2763, 46613), (6447, 19977), (6659, 19341)]