81908645

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{25717}}^1$

素因数の和:25749

約数の個数: 24

約数和(自身を含む): 123137784

約数和(自身を除く): 41229139

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 25717, 128585, 180019, 334321, 900095, 1260133, 1671605, 2340247, 6300665, 11701235, 16381729, 81908645]

約数ペア:

[(1, 81908645), (5, 16381729), (7, 11701235), (13, 6300665), (35, 2340247), (49, 1671605), (65, 1260133), (91, 900095), (245, 334321), (455, 180019), (637, 128585), (3185, 25717)]