21257572

素因数分解:

$2^2\times 7^2\times {\mathrm{108457}}^1$

素因数の和:108475

約数の個数: 18

約数和(自身を含む): 43274742

約数和(自身を除く): 22017170

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 108457, 216914, 433828, 759199, 1518398, 3036796, 5314393, 10628786, 21257572]

約数ペア:

[(1, 21257572), (2, 10628786), (4, 5314393), (7, 3036796), (14, 1518398), (28, 759199), (49, 433828), (98, 216914), (196, 108457)]