78438440

素因数分解:

$2^3\times 5^1\times {\mathrm{1960961}}^1$

素因数の和:1960972

約数の個数: 16

約数和(自身を含む): 176486580

約数和(自身を除く): 98048140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1960961, 3921922, 7843844, 9804805, 15687688, 19609610, 39219220, 78438440]

約数ペア:

[(1, 78438440), (2, 39219220), (4, 19609610), (5, 15687688), (8, 9804805), (10, 7843844), (20, 3921922), (40, 1960961)]