20816744

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{89}}^1\times {\mathrm{173}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 42986700

約数和(自身を除く): 22169956

約数列:

[1, 2, 4, 8, 13, 26, 52, 89, 104, 169, 173, 178, 338, 346, 356, 676, 692, 712, 1157, 1352, 1384, 2249, 2314, 4498, 4628, 8996, 9256, 15041, 15397, 17992, 29237, 30082, 30794, 58474, 60164, 61588, 116948, 120328, 123176, 200161, 233896, 400322, 800644, 1601288, 2602093, 5204186, 10408372, 20816744]

約数ペア:

[(1, 20816744), (2, 10408372), (4, 5204186), (8, 2602093), (13, 1601288), (26, 800644), (52, 400322), (89, 233896), (104, 200161), (169, 123176), (173, 120328), (178, 116948), (338, 61588), (346, 60164), (356, 58474), (676, 30794), (692, 30082), (712, 29237), (1157, 17992), (1352, 15397), (1384, 15041), (2249, 9256), (2314, 8996), (4498, 4628)]