28726803

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{233}}^1$

素因数の和:368

約数の個数: 48

約数和(自身を含む): 50618880

約数和(自身を除く): 21892077

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 103, 133, 171, 233, 309, 399, 699, 721, 927, 1197, 1631, 1957, 2097, 2163, 4427, 4893, 5871, 6489, 13281, 13699, 14679, 17613, 23999, 30989, 39843, 41097, 71997, 92967, 123291, 167993, 215991, 278901, 455981, 503979, 1367943, 1511937, 3191867, 4103829, 9575601, 28726803]

約数ペア:

[(1, 28726803), (3, 9575601), (7, 4103829), (9, 3191867), (19, 1511937), (21, 1367943), (57, 503979), (63, 455981), (103, 278901), (133, 215991), (171, 167993), (233, 123291), (309, 92967), (399, 71997), (699, 41097), (721, 39843), (927, 30989), (1197, 23999), (1631, 17613), (1957, 14679), (2097, 13699), (2163, 13281), (4427, 6489), (4893, 5871)]