21293559

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{10903}}^1$

素因数の和:10947

約数の個数: 24

約数和(自身を含む): 36288512

約数和(自身を除く): 14994953

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 217, 279, 651, 1953, 10903, 32709, 76321, 98127, 228963, 337993, 686889, 1013979, 2365951, 3041937, 7097853, 21293559]

約数ペア:

[(1, 21293559), (3, 7097853), (7, 3041937), (9, 2365951), (21, 1013979), (31, 686889), (63, 337993), (93, 228963), (217, 98127), (279, 76321), (651, 32709), (1953, 10903)]