21031647

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1879}}^1$

素因数の和:1943

約数の個数: 32

約数和(自身を含む): 35374080

約数和(自身を除く): 14342433

約数列:

[1, 3, 7, 13, 21, 39, 41, 91, 123, 273, 287, 533, 861, 1599, 1879, 3731, 5637, 11193, 13153, 24427, 39459, 73281, 77039, 170989, 231117, 512967, 539273, 1001507, 1617819, 3004521, 7010549, 21031647]

約数ペア:

[(1, 21031647), (3, 7010549), (7, 3004521), (13, 1617819), (21, 1001507), (39, 539273), (41, 512967), (91, 231117), (123, 170989), (273, 77039), (287, 73281), (533, 39459), (861, 24427), (1599, 13153), (1879, 11193), (3731, 5637)]