20478731

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1619}}^1$

素因数の和:1778

約数の個数: 16

約数和(自身を含む): 25401600

約数和(自身を除く): 4922869

約数列:

[1, 7, 13, 91, 139, 973, 1619, 1807, 11333, 12649, 21047, 147329, 225041, 1575287, 2925533, 20478731]

約数ペア:

[(1, 20478731), (7, 2925533), (13, 1575287), (91, 225041), (139, 147329), (973, 21047), (1619, 12649), (1807, 11333)]