18923877

素因数分解:

$3^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{2161}}^1$

素因数の和:2313

約数の個数: 24

約数和(自身を含む): 31478720

約数和(自身を除く): 12554843

約数列:

[1, 3, 7, 9, 21, 63, 139, 417, 973, 1251, 2161, 2919, 6483, 8757, 15127, 19449, 45381, 136143, 300379, 901137, 2102653, 2703411, 6307959, 18923877]

約数ペア:

[(1, 18923877), (3, 6307959), (7, 2703411), (9, 2102653), (21, 901137), (63, 300379), (139, 136143), (417, 45381), (973, 19449), (1251, 15127), (2161, 8757), (2919, 6483)]