78405680

素因数分解:

$2^4\times 5^1\times {\mathrm{980071}}^1$

素因数の和:980084

約数の個数: 20

約数和(自身を含む): 182293392

約数和(自身を除く): 103887712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 980071, 1960142, 3920284, 4900355, 7840568, 9800710, 15681136, 19601420, 39202840, 78405680]

約数ペア:

[(1, 78405680), (2, 39202840), (4, 19601420), (5, 15681136), (8, 9800710), (10, 7840568), (16, 4900355), (20, 3920284), (40, 1960142), (80, 980071)]