21742749

素因数分解:

$3^4\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1237}}^1$

素因数の和:1287

約数の個数: 40

約数和(自身を含む): 38348288

約数和(自身を除く): 16605539

約数列:

[1, 3, 7, 9, 21, 27, 31, 63, 81, 93, 189, 217, 279, 567, 651, 837, 1237, 1953, 2511, 3711, 5859, 8659, 11133, 17577, 25977, 33399, 38347, 77931, 100197, 115041, 233793, 268429, 345123, 701379, 805287, 1035369, 2415861, 3106107, 7247583, 21742749]

約数ペア:

[(1, 21742749), (3, 7247583), (7, 3106107), (9, 2415861), (21, 1035369), (27, 805287), (31, 701379), (63, 345123), (81, 268429), (93, 233793), (189, 115041), (217, 100197), (279, 77931), (567, 38347), (651, 33399), (837, 25977), (1237, 17577), (1953, 11133), (2511, 8659), (3711, 5859)]