20163471280

素因数分解:

$2^4\times 5^1\times {\mathrm{811}}^1\times {\mathrm{310781}}^1$

素因数の和:311605

約数の個数: 40

約数和(自身を含む): 46938027024

約数和(自身を除く): 26774555744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 811, 1622, 3244, 4055, 6488, 8110, 12976, 16220, 32440, 64880, 310781, 621562, 1243124, 1553905, 2486248, 3107810, 4972496, 6215620, 12431240, 24862480, 252043391, 504086782, 1008173564, 1260216955, 2016347128, 2520433910, 4032694256, 5040867820, 10081735640, 20163471280]

約数ペア:

[(1, 20163471280), (2, 10081735640), (4, 5040867820), (5, 4032694256), (8, 2520433910), (10, 2016347128), (16, 1260216955), (20, 1008173564), (40, 504086782), (80, 252043391), (811, 24862480), (1622, 12431240), (3244, 6215620), (4055, 4972496), (6488, 3107810), (8110, 2486248), (12976, 1553905), (16220, 1243124), (32440, 621562), (64880, 310781)]