21000718545

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{82355759}}^1$

素因数の和:82355784

約数の個数: 16

約数和(自身を含む): 35577688320

約数和(自身を除く): 14576969775

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 82355759, 247067277, 411778795, 1235336385, 1400047903, 4200143709, 7000239515, 21000718545]

約数ペア:

[(1, 21000718545), (3, 7000239515), (5, 4200143709), (15, 1400047903), (17, 1235336385), (51, 411778795), (85, 247067277), (255, 82355759)]