18919015

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1\times {\mathrm{389}}^1$

素因数の和:602

約数の個数: 16

約数和(自身を含む): 23250240

約数和(自身を除く): 4331225

約数列:

[1, 5, 71, 137, 355, 389, 685, 1945, 9727, 27619, 48635, 53293, 138095, 266465, 3783803, 18919015]

約数ペア:

[(1, 18919015), (5, 3783803), (71, 266465), (137, 138095), (355, 53293), (389, 48635), (685, 27619), (1945, 9727)]