21402255

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{317}}^1\times {\mathrm{643}}^1$

素因数の和:975

約数の個数: 32

約数和(自身を含む): 39320064

約数和(自身を除く): 17917809

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 317, 643, 951, 1585, 1929, 2219, 3215, 4501, 4755, 6657, 9645, 11095, 13503, 22505, 33285, 67515, 203831, 611493, 1019155, 1426817, 3057465, 4280451, 7134085, 21402255]

約数ペア:

[(1, 21402255), (3, 7134085), (5, 4280451), (7, 3057465), (15, 1426817), (21, 1019155), (35, 611493), (105, 203831), (317, 67515), (643, 33285), (951, 22505), (1585, 13503), (1929, 11095), (2219, 9645), (3215, 6657), (4501, 4755)]