21281296

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{32441}}^1$

素因数の和:32490

約数の個数: 20

約数和(自身を含む): 42239484

約数和(自身を除く): 20958188

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 32441, 64882, 129764, 259528, 519056, 1330081, 2660162, 5320324, 10640648, 21281296]

約数ペア:

[(1, 21281296), (2, 10640648), (4, 5320324), (8, 2660162), (16, 1330081), (41, 519056), (82, 259528), (164, 129764), (328, 64882), (656, 32441)]