21339475

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{191}}^1$

素因数の和:351

約数の個数: 24

約数和(自身を含む): 27498240

約数和(自身を除く): 6158765

約数列:

[1, 5, 25, 41, 109, 191, 205, 545, 955, 1025, 2725, 4469, 4775, 7831, 20819, 22345, 39155, 104095, 111725, 195775, 520475, 853579, 4267895, 21339475]

約数ペア:

[(1, 21339475), (5, 4267895), (25, 853579), (41, 520475), (109, 195775), (191, 111725), (205, 104095), (545, 39155), (955, 22345), (1025, 20819), (2725, 7831), (4469, 4775)]