21748688

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{104561}}^1$

素因数の和:104582

約数の個数: 20

約数和(自身を含む): 45379908

約数和(自身を除く): 23631220

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 104561, 209122, 418244, 836488, 1359293, 1672976, 2718586, 5437172, 10874344, 21748688]

約数ペア:

[(1, 21748688), (2, 10874344), (4, 5437172), (8, 2718586), (13, 1672976), (16, 1359293), (26, 836488), (52, 418244), (104, 209122), (208, 104561)]