681328

素因数分解:

$2^4\times {\mathrm{97}}^1\times {\mathrm{439}}^1$

素因数の和:544

約数の個数: 20

約数和(自身を含む): 1336720

約数和(自身を除く): 655392

約数列:

[1, 2, 4, 8, 16, 97, 194, 388, 439, 776, 878, 1552, 1756, 3512, 7024, 42583, 85166, 170332, 340664, 681328]

約数ペア:

[(1, 681328), (2, 340664), (4, 170332), (8, 85166), (16, 42583), (97, 7024), (194, 3512), (388, 1756), (439, 1552), (776, 878)]