21322791

素因数分解:

$3^3\times 7^2\times {\mathrm{71}}^1\times {\mathrm{227}}^1$

素因数の和:321

約数の個数: 48

約数和(自身を含む): 37428480

約数和(自身を除く): 16105689

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 71, 147, 189, 213, 227, 441, 497, 639, 681, 1323, 1491, 1589, 1917, 2043, 3479, 4473, 4767, 6129, 10437, 11123, 13419, 14301, 16117, 31311, 33369, 42903, 48351, 93933, 100107, 112819, 145053, 300321, 338457, 435159, 789733, 1015371, 2369199, 3046113, 7107597, 21322791]

約数ペア:

[(1, 21322791), (3, 7107597), (7, 3046113), (9, 2369199), (21, 1015371), (27, 789733), (49, 435159), (63, 338457), (71, 300321), (147, 145053), (189, 112819), (213, 100107), (227, 93933), (441, 48351), (497, 42903), (639, 33369), (681, 31311), (1323, 16117), (1491, 14301), (1589, 13419), (1917, 11123), (2043, 10437), (3479, 6129), (4473, 4767)]