18729725

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:210

約数の個数: 48

約数和(自身を含む): 28807680

約数和(自身を除く): 10077955

約数列:

[1, 5, 7, 19, 25, 35, 43, 95, 131, 133, 175, 215, 301, 475, 655, 665, 817, 917, 1075, 1505, 2489, 3275, 3325, 4085, 4585, 5633, 5719, 7525, 12445, 17423, 20425, 22925, 28165, 28595, 39431, 62225, 87115, 107027, 140825, 142975, 197155, 435575, 535135, 749189, 985775, 2675675, 3745945, 18729725]

約数ペア:

[(1, 18729725), (5, 3745945), (7, 2675675), (19, 985775), (25, 749189), (35, 535135), (43, 435575), (95, 197155), (131, 142975), (133, 140825), (175, 107027), (215, 87115), (301, 62225), (475, 39431), (655, 28595), (665, 28165), (817, 22925), (917, 20425), (1075, 17423), (1505, 12445), (2489, 7525), (3275, 5719), (3325, 5633), (4085, 4585)]