18969717

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:273

約数の個数: 32

約数和(自身を含む): 28385280

約数和(自身を除く): 9415563

約数列:

[1, 3, 13, 39, 47, 79, 131, 141, 237, 393, 611, 1027, 1703, 1833, 3081, 3713, 5109, 6157, 10349, 11139, 18471, 31047, 48269, 80041, 134537, 144807, 240123, 403611, 486403, 1459209, 6323239, 18969717]

約数ペア:

[(1, 18969717), (3, 6323239), (13, 1459209), (39, 486403), (47, 403611), (79, 240123), (131, 144807), (141, 134537), (237, 80041), (393, 48269), (611, 31047), (1027, 18471), (1703, 11139), (1833, 10349), (3081, 6157), (3713, 5109)]