20178531

素因数分解:

$3^3\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{239}}^1$

素因数の和:360

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 10925469

約数列:

[1, 3, 9, 27, 53, 59, 159, 177, 239, 477, 531, 717, 1431, 1593, 2151, 3127, 6453, 9381, 12667, 14101, 28143, 38001, 42303, 84429, 114003, 126909, 342009, 380727, 747353, 2242059, 6726177, 20178531]

約数ペア:

[(1, 20178531), (3, 6726177), (9, 2242059), (27, 747353), (53, 380727), (59, 342009), (159, 126909), (177, 114003), (239, 84429), (477, 42303), (531, 38001), (717, 28143), (1431, 14101), (1593, 12667), (2151, 9381), (3127, 6453)]