21321272

素因数分解:

$2^3\times 7^2\times {\mathrm{109}}^1\times {\mathrm{499}}^1$

素因数の和:628

約数の個数: 48

約数和(自身を含む): 47025000

約数和(自身を除く): 25703728

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 109, 196, 218, 392, 436, 499, 763, 872, 998, 1526, 1996, 3052, 3493, 3992, 5341, 6104, 6986, 10682, 13972, 21364, 24451, 27944, 42728, 48902, 54391, 97804, 108782, 195608, 217564, 380737, 435128, 761474, 1522948, 2665159, 3045896, 5330318, 10660636, 21321272]

約数ペア:

[(1, 21321272), (2, 10660636), (4, 5330318), (7, 3045896), (8, 2665159), (14, 1522948), (28, 761474), (49, 435128), (56, 380737), (98, 217564), (109, 195608), (196, 108782), (218, 97804), (392, 54391), (436, 48902), (499, 42728), (763, 27944), (872, 24451), (998, 21364), (1526, 13972), (1996, 10682), (3052, 6986), (3493, 6104), (3992, 5341)]