21159016

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{155581}}^1$

素因数の和:155604

約数の個数: 16

約数和(自身を含む): 42007140

約数和(自身を除く): 20848124

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 155581, 311162, 622324, 1244648, 2644877, 5289754, 10579508, 21159016]

約数ペア:

[(1, 21159016), (2, 10579508), (4, 5289754), (8, 2644877), (17, 1244648), (34, 622324), (68, 311162), (136, 155581)]