20668851

素因数分解:

$3^5\times 7^1\times {\mathrm{29}}^1\times {\mathrm{419}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 36691200

約数和(自身を除く): 16022349

約数列:

[1, 3, 7, 9, 21, 27, 29, 63, 81, 87, 189, 203, 243, 261, 419, 567, 609, 783, 1257, 1701, 1827, 2349, 2933, 3771, 5481, 7047, 8799, 11313, 12151, 16443, 26397, 33939, 36453, 49329, 79191, 85057, 101817, 109359, 237573, 255171, 328077, 712719, 765513, 984231, 2296539, 2952693, 6889617, 20668851]

約数ペア:

[(1, 20668851), (3, 6889617), (7, 2952693), (9, 2296539), (21, 984231), (27, 765513), (29, 712719), (63, 328077), (81, 255171), (87, 237573), (189, 109359), (203, 101817), (243, 85057), (261, 79191), (419, 49329), (567, 36453), (609, 33939), (783, 26397), (1257, 16443), (1701, 12151), (1827, 11313), (2349, 8799), (2933, 7047), (3771, 5481)]