81252843

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1$

素因数の和:216

約数の個数: 64

約数和(自身を含む): 137871360

約数和(自身を除く): 56618517

約数列:

[1, 3, 7, 17, 21, 43, 51, 67, 79, 119, 129, 201, 237, 301, 357, 469, 553, 731, 903, 1139, 1343, 1407, 1659, 2193, 2881, 3397, 3417, 4029, 5117, 5293, 7973, 8643, 9401, 10191, 15351, 15879, 20167, 23779, 23919, 28203, 37051, 48977, 57749, 60501, 71337, 89981, 111153, 146931, 173247, 227599, 269943, 342839, 404243, 629867, 682797, 1028517, 1212729, 1593193, 1889601, 3869183, 4779579, 11607549, 27084281, 81252843]

約数ペア:

[(1, 81252843), (3, 27084281), (7, 11607549), (17, 4779579), (21, 3869183), (43, 1889601), (51, 1593193), (67, 1212729), (79, 1028517), (119, 682797), (129, 629867), (201, 404243), (237, 342839), (301, 269943), (357, 227599), (469, 173247), (553, 146931), (731, 111153), (903, 89981), (1139, 71337), (1343, 60501), (1407, 57749), (1659, 48977), (2193, 37051), (2881, 28203), (3397, 23919), (3417, 23779), (4029, 20167), (5117, 15879), (5293, 15351), (7973, 10191), (8643, 9401)]