21553431

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{157}}^1\times {\mathrm{683}}^1$

素因数の和:910

約数の個数: 16

約数和(自身を含む): 29395584

約数和(自身を除く): 7842153

約数列:

[1, 3, 67, 157, 201, 471, 683, 2049, 10519, 31557, 45761, 107231, 137283, 321693, 7184477, 21553431]

約数ペア:

[(1, 21553431), (3, 7184477), (67, 321693), (157, 137283), (201, 107231), (471, 45761), (683, 31557), (2049, 10519)]