20720085

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{389}}^1$

素因数の和:517

約数の個数: 32

約数和(自身を含む): 34369920

約数和(自身を除く): 13649835

約数列:

[1, 3, 5, 15, 53, 67, 159, 201, 265, 335, 389, 795, 1005, 1167, 1945, 3551, 5835, 10653, 17755, 20617, 26063, 53265, 61851, 78189, 103085, 130315, 309255, 390945, 1381339, 4144017, 6906695, 20720085]

約数ペア:

[(1, 20720085), (3, 6906695), (5, 4144017), (15, 1381339), (53, 390945), (67, 309255), (159, 130315), (201, 103085), (265, 78189), (335, 61851), (389, 53265), (795, 26063), (1005, 20617), (1167, 17755), (1945, 10653), (3551, 5835)]