21077517

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{6977}}^1$

素因数の和:7052

約数の個数: 16

約数和(自身を含む): 30144960

約数和(自身を除く): 9067443

約数列:

[1, 3, 19, 53, 57, 159, 1007, 3021, 6977, 20931, 132563, 369781, 397689, 1109343, 7025839, 21077517]

約数ペア:

[(1, 21077517), (3, 7025839), (19, 1109343), (53, 397689), (57, 369781), (159, 132563), (1007, 20931), (3021, 6977)]