20705991

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:259

約数の個数: 32

約数和(自身を含む): 30412800

約数和(自身を除く): 9706809

約数列:

[1, 3, 19, 47, 57, 59, 131, 141, 177, 393, 893, 1121, 2489, 2679, 2773, 3363, 6157, 7467, 7729, 8319, 18471, 23187, 52687, 116983, 146851, 158061, 350949, 363263, 440553, 1089789, 6901997, 20705991]

約数ペア:

[(1, 20705991), (3, 6901997), (19, 1089789), (47, 440553), (57, 363263), (59, 350949), (131, 158061), (141, 146851), (177, 116983), (393, 52687), (893, 23187), (1121, 18471), (2489, 8319), (2679, 7729), (2773, 7467), (3363, 6157)]