21891814

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{67987}}^1$

素因数の和:68019

約数の個数: 16

約数和(自身を含む): 39161088

約数和(自身を除く): 17269274

約数列:

[1, 2, 7, 14, 23, 46, 161, 322, 67987, 135974, 475909, 951818, 1563701, 3127402, 10945907, 21891814]

約数ペア:

[(1, 21891814), (2, 10945907), (7, 3127402), (14, 1563701), (23, 951818), (46, 475909), (161, 135974), (322, 67987)]