28156149

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{257}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 48941568

約数和(自身を除く): 20785419

約数列:

[1, 3, 7, 9, 21, 37, 47, 63, 111, 141, 257, 259, 329, 333, 423, 771, 777, 987, 1739, 1799, 2313, 2331, 2961, 5217, 5397, 9509, 12079, 12173, 15651, 16191, 28527, 36237, 36519, 66563, 84553, 85581, 108711, 109557, 199689, 253659, 446923, 599067, 760977, 1340769, 3128461, 4022307, 9385383, 28156149]

約数ペア:

[(1, 28156149), (3, 9385383), (7, 4022307), (9, 3128461), (21, 1340769), (37, 760977), (47, 599067), (63, 446923), (111, 253659), (141, 199689), (257, 109557), (259, 108711), (329, 85581), (333, 84553), (423, 66563), (771, 36519), (777, 36237), (987, 28527), (1739, 16191), (1799, 15651), (2313, 12173), (2331, 12079), (2961, 9509), (5217, 5397)]