21189049

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{3557}}^1$

素因数の和:3624

約数の個数: 16

約数和(自身を含む): 25959168

約数和(自身を除く): 4770119

約数列:

[1, 7, 23, 37, 161, 259, 851, 3557, 5957, 24899, 81811, 131609, 572677, 921263, 3027007, 21189049]

約数ペア:

[(1, 21189049), (7, 3027007), (23, 921263), (37, 572677), (161, 131609), (259, 81811), (851, 24899), (3557, 5957)]