78002420

素因数分解:

$2^2\times 5^1\times {\mathrm{3900121}}^1$

素因数の和:3900130

約数の個数: 12

約数和(自身を含む): 163805124

約数和(自身を除く): 85802704

約数列:

[1, 2, 4, 5, 10, 20, 3900121, 7800242, 15600484, 19500605, 39001210, 78002420]

約数ペア:

[(1, 78002420), (2, 39001210), (4, 19500605), (5, 15600484), (10, 7800242), (20, 3900121)]