21879963

素因数分解:

$3^5\times 7^1\times {\mathrm{19}}^1\times {\mathrm{677}}^1$

素因数の和:718

約数の個数: 48

約数和(自身を含む): 39486720

約数和(自身を除く): 17606757

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 133, 171, 189, 243, 399, 513, 567, 677, 1197, 1539, 1701, 2031, 3591, 4617, 4739, 6093, 10773, 12863, 14217, 18279, 32319, 38589, 42651, 54837, 90041, 115767, 127953, 164511, 270123, 347301, 383859, 810369, 1041903, 1151577, 2431107, 3125709, 7293321, 21879963]

約数ペア:

[(1, 21879963), (3, 7293321), (7, 3125709), (9, 2431107), (19, 1151577), (21, 1041903), (27, 810369), (57, 383859), (63, 347301), (81, 270123), (133, 164511), (171, 127953), (189, 115767), (243, 90041), (399, 54837), (513, 42651), (567, 38589), (677, 32319), (1197, 18279), (1539, 14217), (1701, 12863), (2031, 10773), (3591, 6093), (4617, 4739)]