138738460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{990989}}^1$

素因数の和:991005

約数の個数: 24

約数和(自身を含む): 332972640

約数和(自身を除く): 194234180

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 990989, 1981978, 3963956, 4954945, 6936923, 9909890, 13873846, 19819780, 27747692, 34684615, 69369230, 138738460]

約数ペア:

[(1, 138738460), (2, 69369230), (4, 34684615), (5, 27747692), (7, 19819780), (10, 13873846), (14, 9909890), (20, 6936923), (28, 4954945), (35, 3963956), (70, 1981978), (140, 990989)]