18409923

素因数分解:

$3^5\times 7^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 32148480

約数和(自身を除く): 13738557

約数列:

[1, 3, 7, 9, 21, 27, 63, 79, 81, 137, 189, 237, 243, 411, 553, 567, 711, 959, 1233, 1659, 1701, 2133, 2877, 3699, 4977, 6399, 8631, 10823, 11097, 14931, 19197, 25893, 32469, 33291, 44793, 75761, 77679, 97407, 134379, 227283, 233037, 292221, 681849, 876663, 2045547, 2629989, 6136641, 18409923]

約数ペア:

[(1, 18409923), (3, 6136641), (7, 2629989), (9, 2045547), (21, 876663), (27, 681849), (63, 292221), (79, 233037), (81, 227283), (137, 134379), (189, 97407), (237, 77679), (243, 75761), (411, 44793), (553, 33291), (567, 32469), (711, 25893), (959, 19197), (1233, 14931), (1659, 11097), (1701, 10823), (2133, 8631), (2877, 6399), (3699, 4977)]