20728810

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{1381}}^1$

素因数の和:1486

約数の個数: 32

約数和(自身を含む): 39801600

約数和(自身を除く): 19072790

約数列:

[1, 2, 5, 10, 19, 38, 79, 95, 158, 190, 395, 790, 1381, 1501, 2762, 3002, 6905, 7505, 13810, 15010, 26239, 52478, 109099, 131195, 218198, 262390, 545495, 1090990, 2072881, 4145762, 10364405, 20728810]

約数ペア:

[(1, 20728810), (2, 10364405), (5, 4145762), (10, 2072881), (19, 1090990), (38, 545495), (79, 262390), (95, 218198), (158, 131195), (190, 109099), (395, 52478), (790, 26239), (1381, 15010), (1501, 13810), (2762, 7505), (3002, 6905)]