21578219

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{251}}^1\times {\mathrm{389}}^1$

素因数の和:670

約数の個数: 16

約数和(自身を含む): 24766560

約数和(自身を除く): 3188341

約数列:

[1, 13, 17, 221, 251, 389, 3263, 4267, 5057, 6613, 55471, 85969, 97639, 1269307, 1659863, 21578219]

約数ペア:

[(1, 21578219), (13, 1659863), (17, 1269307), (221, 97639), (251, 85969), (389, 55471), (3263, 6613), (4267, 5057)]