21270123

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{10891}}^1$

素因数の和:10935

約数の個数: 24

約数和(自身を含む): 36248576

約数和(自身を除く): 14978453

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 217, 279, 651, 1953, 10891, 32673, 76237, 98019, 228711, 337621, 686133, 1012863, 2363347, 3038589, 7090041, 21270123]

約数ペア:

[(1, 21270123), (3, 7090041), (7, 3038589), (9, 2363347), (21, 1012863), (31, 686133), (63, 337621), (93, 228711), (217, 98019), (279, 76237), (651, 32673), (1953, 10891)]