21389648

素因数分解:

$2^4\times 7^1\times {\mathrm{190979}}^1$

素因数の和:190994

約数の個数: 20

約数和(自身を含む): 47363040

約数和(自身を除く): 25973392

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 190979, 381958, 763916, 1336853, 1527832, 2673706, 3055664, 5347412, 10694824, 21389648]

約数ペア:

[(1, 21389648), (2, 10694824), (4, 5347412), (7, 3055664), (8, 2673706), (14, 1527832), (16, 1336853), (28, 763916), (56, 381958), (112, 190979)]