19770380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{283}}^1\times {\mathrm{499}}^1$

素因数の和:798

約数の個数: 48

約数和(自身を含む): 47712000

約数和(自身を除く): 27941620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 283, 499, 566, 998, 1132, 1415, 1981, 1996, 2495, 2830, 3493, 3962, 4990, 5660, 6986, 7924, 9905, 9980, 13972, 17465, 19810, 34930, 39620, 69860, 141217, 282434, 564868, 706085, 988519, 1412170, 1977038, 2824340, 3954076, 4942595, 9885190, 19770380]

約数ペア:

[(1, 19770380), (2, 9885190), (4, 4942595), (5, 3954076), (7, 2824340), (10, 1977038), (14, 1412170), (20, 988519), (28, 706085), (35, 564868), (70, 282434), (140, 141217), (283, 69860), (499, 39620), (566, 34930), (998, 19810), (1132, 17465), (1415, 13972), (1981, 9980), (1996, 9905), (2495, 7924), (2830, 6986), (3493, 5660), (3962, 4990)]