18404991

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{137}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 31000320

約数和(自身を除く): 12595329

約数列:

[1, 3, 9, 11, 23, 33, 59, 69, 99, 137, 177, 207, 253, 411, 531, 649, 759, 1233, 1357, 1507, 1947, 2277, 3151, 4071, 4521, 5841, 8083, 9453, 12213, 13563, 14927, 24249, 28359, 34661, 44781, 72747, 88913, 103983, 134343, 185909, 266739, 311949, 557727, 800217, 1673181, 2044999, 6134997, 18404991]

約数ペア:

[(1, 18404991), (3, 6134997), (9, 2044999), (11, 1673181), (23, 800217), (33, 557727), (59, 311949), (69, 266739), (99, 185909), (137, 134343), (177, 103983), (207, 88913), (253, 72747), (411, 44781), (531, 34661), (649, 28359), (759, 24249), (1233, 14927), (1357, 13563), (1507, 12213), (1947, 9453), (2277, 8083), (3151, 5841), (4071, 4521)]