21704697

素因数分解:

$3^2\times 7^3\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:195

約数の個数: 48

約数和(自身を含む): 37440000

約数和(自身を除く): 15735303

約数列:

[1, 3, 7, 9, 21, 49, 63, 79, 89, 147, 237, 267, 343, 441, 553, 623, 711, 801, 1029, 1659, 1869, 3087, 3871, 4361, 4977, 5607, 7031, 11613, 13083, 21093, 27097, 30527, 34839, 39249, 49217, 63279, 81291, 91581, 147651, 243873, 274743, 344519, 442953, 1033557, 2411633, 3100671, 7234899, 21704697]

約数ペア:

[(1, 21704697), (3, 7234899), (7, 3100671), (9, 2411633), (21, 1033557), (49, 442953), (63, 344519), (79, 274743), (89, 243873), (147, 147651), (237, 91581), (267, 81291), (343, 63279), (441, 49217), (553, 39249), (623, 34839), (711, 30527), (801, 27097), (1029, 21093), (1659, 13083), (1869, 11613), (3087, 7031), (3871, 5607), (4361, 4977)]