21953757

素因数分解:

$3^1\times 7^1\times {\mathrm{757}}^1\times {\mathrm{1381}}^1$

素因数の和:2148

約数の個数: 16

約数和(自身を含む): 33521792

約数和(自身を除く): 11568035

約数列:

[1, 3, 7, 21, 757, 1381, 2271, 4143, 5299, 9667, 15897, 29001, 1045417, 3136251, 7317919, 21953757]

約数ペア:

[(1, 21953757), (3, 7317919), (7, 3136251), (21, 1045417), (757, 29001), (1381, 15897), (2271, 9667), (4143, 5299)]