21069125

素因数分解:

$5^3\times 7^1\times {\mathrm{11}}^2\times {\mathrm{199}}^1$

素因数の和:243

約数の個数: 48

約数和(自身を含む): 33196800

約数和(自身を除く): 12127675

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 121, 125, 175, 199, 275, 385, 605, 847, 875, 995, 1375, 1393, 1925, 2189, 3025, 4235, 4975, 6965, 9625, 10945, 15125, 15323, 21175, 24079, 24875, 34825, 54725, 76615, 105875, 120395, 168553, 174125, 273625, 383075, 601975, 842765, 1915375, 3009875, 4213825, 21069125]

約数ペア:

[(1, 21069125), (5, 4213825), (7, 3009875), (11, 1915375), (25, 842765), (35, 601975), (55, 383075), (77, 273625), (121, 174125), (125, 168553), (175, 120395), (199, 105875), (275, 76615), (385, 54725), (605, 34825), (847, 24875), (875, 24079), (995, 21175), (1375, 15323), (1393, 15125), (1925, 10945), (2189, 9625), (3025, 6965), (4235, 4975)]