21262419

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{113}}^1$

素因数の和:249

約数の個数: 40

約数和(自身を含む): 33767712

約数和(自身を除く): 12505293

約数列:

[1, 3, 9, 23, 27, 69, 81, 101, 113, 207, 303, 339, 621, 909, 1017, 1863, 2323, 2599, 2727, 3051, 6969, 7797, 8181, 9153, 11413, 20907, 23391, 34239, 62721, 70173, 102717, 188163, 210519, 262499, 308151, 787497, 924453, 2362491, 7087473, 21262419]

約数ペア:

[(1, 21262419), (3, 7087473), (9, 2362491), (23, 924453), (27, 787497), (69, 308151), (81, 262499), (101, 210519), (113, 188163), (207, 102717), (303, 70173), (339, 62721), (621, 34239), (909, 23391), (1017, 20907), (1863, 11413), (2323, 9153), (2599, 8181), (2727, 7797), (3051, 6969)]