18943779

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:255

約数の個数: 32

約数和(自身を含む): 27878400

約数和(自身を除く): 8934621

約数列:

[1, 3, 19, 43, 57, 59, 129, 131, 177, 393, 817, 1121, 2451, 2489, 2537, 3363, 5633, 7467, 7611, 7729, 16899, 23187, 48203, 107027, 144609, 146851, 321081, 332347, 440553, 997041, 6314593, 18943779]

約数ペア:

[(1, 18943779), (3, 6314593), (19, 997041), (43, 440553), (57, 332347), (59, 321081), (129, 146851), (131, 144609), (177, 107027), (393, 48203), (817, 23187), (1121, 16899), (2451, 7729), (2489, 7611), (2537, 7467), (3363, 5633)]