3999940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{28571}}^1$

素因数の和:28587

約数の個数: 24

約数和(自身を含む): 9600192

約数和(自身を除く): 5600252

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 28571, 57142, 114284, 142855, 199997, 285710, 399994, 571420, 799988, 999985, 1999970, 3999940]

約数ペア:

[(1, 3999940), (2, 1999970), (4, 999985), (5, 799988), (7, 571420), (10, 399994), (14, 285710), (20, 199997), (28, 142855), (35, 114284), (70, 57142), (140, 28571)]