20854421

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{1103}}^1$

素因数の和:1220

約数の個数: 16

約数和(自身を含む): 24835584

約数和(自身を除く): 3981163

約数列:

[1, 7, 37, 73, 259, 511, 1103, 2701, 7721, 18907, 40811, 80519, 285677, 563633, 2979203, 20854421]

約数ペア:

[(1, 20854421), (7, 2979203), (37, 563633), (73, 285677), (259, 80519), (511, 40811), (1103, 18907), (2701, 7721)]