155990020

素因数分解:

$2^2\times 5^1\times {\mathrm{7799501}}^1$

素因数の和:7799510

約数の個数: 12

約数和(自身を含む): 327579084

約数和(自身を除く): 171589064

約数列:

[1, 2, 4, 5, 10, 20, 7799501, 15599002, 31198004, 38997505, 77995010, 155990020]

約数ペア:

[(1, 155990020), (2, 77995010), (4, 38997505), (5, 31198004), (10, 15599002), (20, 7799501)]