78880520

素因数分解:

$2^3\times 5^1\times {\mathrm{1972013}}^1$

素因数の和:1972024

約数の個数: 16

約数和(自身を含む): 177481260

約数和(自身を除く): 98600740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1972013, 3944026, 7888052, 9860065, 15776104, 19720130, 39440260, 78880520]

約数ペア:

[(1, 78880520), (2, 39440260), (4, 19720130), (5, 15776104), (8, 9860065), (10, 7888052), (20, 3944026), (40, 1972013)]