28138460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{200989}}^1$

素因数の和:201005

約数の個数: 24

約数和(自身を含む): 67532640

約数和(自身を除く): 39394180

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 200989, 401978, 803956, 1004945, 1406923, 2009890, 2813846, 4019780, 5627692, 7034615, 14069230, 28138460]

約数ペア:

[(1, 28138460), (2, 14069230), (4, 7034615), (5, 5627692), (7, 4019780), (10, 2813846), (14, 2009890), (20, 1406923), (28, 1004945), (35, 803956), (70, 401978), (140, 200989)]