28140020

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{15809}}^1$

素因数の和:15907

約数の個数: 24

約数和(自身を含む): 59761800

約数和(自身を除く): 31621780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 15809, 31618, 63236, 79045, 158090, 316180, 1407001, 2814002, 5628004, 7035005, 14070010, 28140020]

約数ペア:

[(1, 28140020), (2, 14070010), (4, 7035005), (5, 5628004), (10, 2814002), (20, 1407001), (89, 316180), (178, 158090), (356, 79045), (445, 63236), (890, 31618), (1780, 15809)]