20678320

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{337}}^1$

素因数の和:422

約数の個数: 80

約数和(自身を含む): 52809120

約数和(自身を除く): 32130800

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 59, 65, 80, 104, 118, 130, 208, 236, 260, 295, 337, 472, 520, 590, 674, 767, 944, 1040, 1180, 1348, 1534, 1685, 2360, 2696, 3068, 3370, 3835, 4381, 4720, 5392, 6136, 6740, 7670, 8762, 12272, 13480, 15340, 17524, 19883, 21905, 26960, 30680, 35048, 39766, 43810, 61360, 70096, 79532, 87620, 99415, 159064, 175240, 198830, 258479, 318128, 350480, 397660, 516958, 795320, 1033916, 1292395, 1590640, 2067832, 2584790, 4135664, 5169580, 10339160, 20678320]

約数ペア:

[(1, 20678320), (2, 10339160), (4, 5169580), (5, 4135664), (8, 2584790), (10, 2067832), (13, 1590640), (16, 1292395), (20, 1033916), (26, 795320), (40, 516958), (52, 397660), (59, 350480), (65, 318128), (80, 258479), (104, 198830), (118, 175240), (130, 159064), (208, 99415), (236, 87620), (260, 79532), (295, 70096), (337, 61360), (472, 43810), (520, 39766), (590, 35048), (674, 30680), (767, 26960), (944, 21905), (1040, 19883), (1180, 17524), (1348, 15340), (1534, 13480), (1685, 12272), (2360, 8762), (2696, 7670), (3068, 6740), (3370, 6136), (3835, 5392), (4381, 4720)]