20154355

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{997}}^1$

素因数の和:1326

約数の個数: 16

約数和(自身を含む): 26155584

約数和(自身を除く): 6001229

約数列:

[1, 5, 13, 65, 311, 997, 1555, 4043, 4985, 12961, 20215, 64805, 310067, 1550335, 4030871, 20154355]

約数ペア:

[(1, 20154355), (5, 4030871), (13, 1550335), (65, 310067), (311, 64805), (997, 20215), (1555, 12961), (4043, 4985)]