21719747

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{991}}^1$

素因数の和:1130

約数の個数: 16

約数和(自身を含む): 25903104

約数和(自身を除く): 4183357

約数列:

[1, 7, 31, 101, 217, 707, 991, 3131, 6937, 21917, 30721, 100091, 215047, 700637, 3102821, 21719747]

約数ペア:

[(1, 21719747), (7, 3102821), (31, 700637), (101, 215047), (217, 100091), (707, 30721), (991, 21917), (3131, 6937)]