21965517

素因数分解:

$3^2\times 7^1\times {\mathrm{151}}^1\times {\mathrm{2309}}^1$

素因数の和:2473

約数の個数: 24

約数和(自身を含む): 36516480

約数和(自身を除く): 14550963

約数列:

[1, 3, 7, 9, 21, 63, 151, 453, 1057, 1359, 2309, 3171, 6927, 9513, 16163, 20781, 48489, 145467, 348659, 1045977, 2440613, 3137931, 7321839, 21965517]

約数ペア:

[(1, 21965517), (3, 7321839), (7, 3137931), (9, 2440613), (21, 1045977), (63, 348659), (151, 145467), (453, 48489), (1057, 20781), (1359, 16163), (2309, 9513), (3171, 6927)]