639448

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{1193}}^1$

素因数の和:1266

約数の個数: 16

約数和(自身を含む): 1217880

約数和(自身を除く): 578432

約数列:

[1, 2, 4, 8, 67, 134, 268, 536, 1193, 2386, 4772, 9544, 79931, 159862, 319724, 639448]

約数ペア:

[(1, 639448), (2, 319724), (4, 159862), (8, 79931), (67, 9544), (134, 4772), (268, 2386), (536, 1193)]