79402420

素因数分解:

$2^2\times 5^1\times {\mathrm{3970121}}^1$

素因数の和:3970130

約数の個数: 12

約数和(自身を含む): 166745124

約数和(自身を除く): 87342704

約数列:

[1, 2, 4, 5, 10, 20, 3970121, 7940242, 15880484, 19850605, 39701210, 79402420]

約数ペア:

[(1, 79402420), (2, 39701210), (4, 19850605), (5, 15880484), (10, 7940242), (20, 3970121)]