20757429

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^2\times {\mathrm{389}}^1$

素因数の和:431

約数の個数: 54

約数和(自身を含む): 38435670

約数和(自身を除く): 17678241

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 63, 77, 99, 121, 147, 231, 363, 389, 441, 539, 693, 847, 1089, 1167, 1617, 2541, 2723, 3501, 4279, 4851, 5929, 7623, 8169, 12837, 17787, 19061, 24507, 29953, 38511, 47069, 53361, 57183, 89859, 141207, 171549, 209671, 269577, 329483, 423621, 629013, 988449, 1887039, 2306381, 2965347, 6919143, 20757429]

約数ペア:

[(1, 20757429), (3, 6919143), (7, 2965347), (9, 2306381), (11, 1887039), (21, 988449), (33, 629013), (49, 423621), (63, 329483), (77, 269577), (99, 209671), (121, 171549), (147, 141207), (231, 89859), (363, 57183), (389, 53361), (441, 47069), (539, 38511), (693, 29953), (847, 24507), (1089, 19061), (1167, 17787), (1617, 12837), (2541, 8169), (2723, 7623), (3501, 5929), (4279, 4851)]