19943847

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1$

素因数の和:261

約数の個数: 64

約数和(自身を含む): 37739520

約数和(自身を除く): 17795673

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 53, 63, 77, 99, 159, 181, 189, 231, 297, 371, 477, 543, 583, 693, 1113, 1267, 1431, 1629, 1749, 1991, 2079, 3339, 3801, 4081, 4887, 5247, 5973, 9593, 10017, 11403, 12243, 13937, 15741, 17919, 28779, 34209, 36729, 41811, 53757, 67151, 86337, 105523, 110187, 125433, 201453, 259011, 316569, 376299, 604359, 738661, 949707, 1813077, 2215983, 2849121, 6647949, 19943847]

約数ペア:

[(1, 19943847), (3, 6647949), (7, 2849121), (9, 2215983), (11, 1813077), (21, 949707), (27, 738661), (33, 604359), (53, 376299), (63, 316569), (77, 259011), (99, 201453), (159, 125433), (181, 110187), (189, 105523), (231, 86337), (297, 67151), (371, 53757), (477, 41811), (543, 36729), (583, 34209), (693, 28779), (1113, 17919), (1267, 15741), (1431, 13937), (1629, 12243), (1749, 11403), (1991, 10017), (2079, 9593), (3339, 5973), (3801, 5247), (4081, 4887)]