19997907

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{4337}}^1$

素因数の和:4422

約数の個数: 16

約数和(自身を含む): 28110240

約数和(自身を除く): 8112333

約数列:

[1, 3, 29, 53, 87, 159, 1537, 4337, 4611, 13011, 125773, 229861, 377319, 689583, 6665969, 19997907]

約数ペア:

[(1, 19997907), (3, 6665969), (29, 689583), (53, 377319), (87, 229861), (159, 125773), (1537, 13011), (4337, 4611)]