21021790

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{110641}}^1$

素因数の和:110667

約数の個数: 16

約数和(自身を含む): 39831120

約数和(自身を除く): 18809330

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 110641, 221282, 553205, 1106410, 2102179, 4204358, 10510895, 21021790]

約数ペア:

[(1, 21021790), (2, 10510895), (5, 4204358), (10, 2102179), (19, 1106410), (38, 553205), (95, 221282), (190, 110641)]