21558069

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{347}}^1$

素因数の和:431

約数の個数: 40

約数和(自身を含む): 35370720

約数和(自身を除く): 13812651

約数列:

[1, 3, 9, 13, 27, 39, 59, 81, 117, 177, 347, 351, 531, 767, 1041, 1053, 1593, 2301, 3123, 4511, 4779, 6903, 9369, 13533, 20473, 20709, 28107, 40599, 61419, 62127, 121797, 184257, 266149, 365391, 552771, 798447, 1658313, 2395341, 7186023, 21558069]

約数ペア:

[(1, 21558069), (3, 7186023), (9, 2395341), (13, 1658313), (27, 798447), (39, 552771), (59, 365391), (81, 266149), (117, 184257), (177, 121797), (347, 62127), (351, 61419), (531, 40599), (767, 28107), (1041, 20709), (1053, 20473), (1593, 13533), (2301, 9369), (3123, 6903), (4511, 4779)]