21000978815

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{811}}^1\times {\mathrm{4547}}^1$

素因数の和:5447

約数の個数: 32

約数和(自身を含む): 27121215744

約数和(自身を除く): 6120236929

約数列:

[1, 5, 17, 67, 85, 335, 811, 1139, 4055, 4547, 5695, 13787, 22735, 54337, 68935, 77299, 271685, 304649, 386495, 923729, 1523245, 3687617, 4618645, 5179033, 18438085, 25895165, 62689489, 247070339, 313447445, 1235351695, 4200195763, 21000978815]

約数ペア:

[(1, 21000978815), (5, 4200195763), (17, 1235351695), (67, 313447445), (85, 247070339), (335, 62689489), (811, 25895165), (1139, 18438085), (4055, 5179033), (4547, 4618645), (5695, 3687617), (13787, 1523245), (22735, 923729), (54337, 386495), (68935, 304649), (77299, 271685)]