78868280

素因数分解:

$2^3\times 5^1\times {\mathrm{1971707}}^1$

素因数の和:1971718

約数の個数: 16

約数和(自身を含む): 177453720

約数和(自身を除く): 98585440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1971707, 3943414, 7886828, 9858535, 15773656, 19717070, 39434140, 78868280]

約数ペア:

[(1, 78868280), (2, 39434140), (4, 19717070), (5, 15773656), (8, 9858535), (10, 7886828), (20, 3943414), (40, 1971707)]