18211557

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{3511}}^1$

素因数の和:3553

約数の個数: 32

約数和(自身を含む): 31467520

約数和(自身を除く): 13255963

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 133, 247, 273, 399, 741, 1729, 3511, 5187, 10533, 24577, 45643, 66709, 73731, 136929, 200127, 319501, 466963, 867217, 958503, 1400889, 2601651, 6070519, 18211557]

約数ペア:

[(1, 18211557), (3, 6070519), (7, 2601651), (13, 1400889), (19, 958503), (21, 867217), (39, 466963), (57, 319501), (91, 200127), (133, 136929), (247, 73731), (273, 66709), (399, 45643), (741, 24577), (1729, 10533), (3511, 5187)]