20280507

素因数分解:

$3^1\times {\mathrm{13}}^3\times {\mathrm{17}}^1\times {\mathrm{181}}^1$

素因数の和:240

約数の個数: 32

約数和(自身を含む): 31187520

約数和(自身を除く): 10907013

約数列:

[1, 3, 13, 17, 39, 51, 169, 181, 221, 507, 543, 663, 2197, 2353, 2873, 3077, 6591, 7059, 8619, 9231, 30589, 37349, 40001, 91767, 112047, 120003, 397657, 520013, 1192971, 1560039, 6760169, 20280507]

約数ペア:

[(1, 20280507), (3, 6760169), (13, 1560039), (17, 1192971), (39, 520013), (51, 397657), (169, 120003), (181, 112047), (221, 91767), (507, 40001), (543, 37349), (663, 30589), (2197, 9231), (2353, 8619), (2873, 7059), (3077, 6591)]