20939919

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{367}}^1$

素因数の和:420

約数の個数: 64

約数和(自身を含む): 39567360

約数和(自身を除く): 18627441

約数列:

[1, 3, 7, 11, 13, 19, 21, 33, 39, 57, 77, 91, 133, 143, 209, 231, 247, 273, 367, 399, 429, 627, 741, 1001, 1101, 1463, 1729, 2569, 2717, 3003, 4037, 4389, 4771, 5187, 6973, 7707, 8151, 12111, 14313, 19019, 20919, 28259, 33397, 48811, 52481, 57057, 76703, 84777, 90649, 100191, 146433, 157443, 230109, 271947, 367367, 536921, 634543, 997139, 1102101, 1610763, 1903629, 2991417, 6979973, 20939919]

約数ペア:

[(1, 20939919), (3, 6979973), (7, 2991417), (11, 1903629), (13, 1610763), (19, 1102101), (21, 997139), (33, 634543), (39, 536921), (57, 367367), (77, 271947), (91, 230109), (133, 157443), (143, 146433), (209, 100191), (231, 90649), (247, 84777), (273, 76703), (367, 57057), (399, 52481), (429, 48811), (627, 33397), (741, 28259), (1001, 20919), (1101, 19019), (1463, 14313), (1729, 12111), (2569, 8151), (2717, 7707), (3003, 6973), (4037, 5187), (4389, 4771)]