21806631

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{617}}^1$

素因数の和:661

約数の個数: 64

約数和(自身を含む): 42716160

約数和(自身を除く): 20909529

約数列:

[1, 3, 7, 9, 11, 17, 21, 27, 33, 51, 63, 77, 99, 119, 153, 187, 189, 231, 297, 357, 459, 561, 617, 693, 1071, 1309, 1683, 1851, 2079, 3213, 3927, 4319, 5049, 5553, 6787, 10489, 11781, 12957, 16659, 20361, 31467, 35343, 38871, 47509, 61083, 73423, 94401, 115379, 116613, 142527, 183249, 220269, 283203, 346137, 427581, 660807, 807653, 1038411, 1282743, 1982421, 2422959, 3115233, 7268877, 21806631]

約数ペア:

[(1, 21806631), (3, 7268877), (7, 3115233), (9, 2422959), (11, 1982421), (17, 1282743), (21, 1038411), (27, 807653), (33, 660807), (51, 427581), (63, 346137), (77, 283203), (99, 220269), (119, 183249), (153, 142527), (187, 116613), (189, 115379), (231, 94401), (297, 73423), (357, 61083), (459, 47509), (561, 38871), (617, 35343), (693, 31467), (1071, 20361), (1309, 16659), (1683, 12957), (1851, 11781), (2079, 10489), (3213, 6787), (3927, 5553), (4319, 5049)]