21393890

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{43661}}^1$

素因数の和:43682

約数の個数: 24

約数和(自身を含む): 44797212

約数和(自身を除く): 23403322

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 43661, 87322, 218305, 305627, 436610, 611254, 1528135, 2139389, 3056270, 4278778, 10696945, 21393890]

約数ペア:

[(1, 21393890), (2, 10696945), (5, 4278778), (7, 3056270), (10, 2139389), (14, 1528135), (35, 611254), (49, 436610), (70, 305627), (98, 218305), (245, 87322), (490, 43661)]