16899640

素因数分解:

$2^3\times 5^1\times {\mathrm{647}}^1\times {\mathrm{653}}^1$

素因数の和:1311

約数の個数: 32

約数和(自身を含む): 38141280

約数和(自身を除く): 21241640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 647, 653, 1294, 1306, 2588, 2612, 3235, 3265, 5176, 5224, 6470, 6530, 12940, 13060, 25880, 26120, 422491, 844982, 1689964, 2112455, 3379928, 4224910, 8449820, 16899640]

約数ペア:

[(1, 16899640), (2, 8449820), (4, 4224910), (5, 3379928), (8, 2112455), (10, 1689964), (20, 844982), (40, 422491), (647, 26120), (653, 25880), (1294, 13060), (1306, 12940), (2588, 6530), (2612, 6470), (3235, 5224), (3265, 5176)]