18903969

素因数分解:

$3^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{3449}}^1$

素因数の和:3494

約数の個数: 32

約数和(自身を含む): 33120000

約数和(自身を除く): 14216031

約数列:

[1, 3, 7, 9, 21, 27, 29, 63, 87, 189, 203, 261, 609, 783, 1827, 3449, 5481, 10347, 24143, 31041, 72429, 93123, 100021, 217287, 300063, 651861, 700147, 900189, 2100441, 2700567, 6301323, 18903969]

約数ペア:

[(1, 18903969), (3, 6301323), (7, 2700567), (9, 2100441), (21, 900189), (27, 700147), (29, 651861), (63, 300063), (87, 217287), (189, 100021), (203, 93123), (261, 72429), (609, 31041), (783, 24143), (1827, 10347), (3449, 5481)]