28257275

素因数分解:

$5^2\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{101}}^1$

素因数の和:180

約数の個数: 36

約数和(自身を含む): 38551104

約数和(自身を除く): 10293829

約数列:

[1, 5, 19, 25, 31, 95, 101, 155, 361, 475, 505, 589, 775, 1805, 1919, 2525, 2945, 3131, 9025, 9595, 11191, 14725, 15655, 36461, 47975, 55955, 59489, 78275, 182305, 279775, 297445, 911525, 1130291, 1487225, 5651455, 28257275]

約数ペア:

[(1, 28257275), (5, 5651455), (19, 1487225), (25, 1130291), (31, 911525), (95, 297445), (101, 279775), (155, 182305), (361, 78275), (475, 59489), (505, 55955), (589, 47975), (775, 36461), (1805, 15655), (1919, 14725), (2525, 11191), (2945, 9595), (3131, 9025)]