21687664

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{71341}}^1$

素因数の和:71368

約数の個数: 20

約数和(自身を含む): 44232040

約数和(自身を除く): 22544376

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 71341, 142682, 285364, 570728, 1141456, 1355479, 2710958, 5421916, 10843832, 21687664]

約数ペア:

[(1, 21687664), (2, 10843832), (4, 5421916), (8, 2710958), (16, 1355479), (19, 1141456), (38, 570728), (76, 285364), (152, 142682), (304, 71341)]