20972973

素因数分解:

$3^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{13681}}^1$

素因数の和:13764

約数の個数: 16

約数和(自身を含む): 32398976

約数和(自身を除く): 11426003

約数列:

[1, 3, 7, 21, 73, 219, 511, 1533, 13681, 41043, 95767, 287301, 998713, 2996139, 6990991, 20972973]

約数ペア:

[(1, 20972973), (3, 6990991), (7, 2996139), (21, 998713), (73, 287301), (219, 95767), (511, 41043), (1533, 13681)]