21258860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{151849}}^1$

素因数の和:151865

約数の個数: 24

約数和(自身を含む): 51021600

約数和(自身を除く): 29762740

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151849, 303698, 607396, 759245, 1062943, 1518490, 2125886, 3036980, 4251772, 5314715, 10629430, 21258860]

約数ペア:

[(1, 21258860), (2, 10629430), (4, 5314715), (5, 4251772), (7, 3036980), (10, 2125886), (14, 1518490), (20, 1062943), (28, 759245), (35, 607396), (70, 303698), (140, 151849)]