20779825

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1$

素因数の和:178

約数の個数: 48

約数和(自身を含む): 30623040

約数和(自身を除く): 9843215

約数列:

[1, 5, 11, 19, 25, 41, 55, 95, 97, 205, 209, 275, 451, 475, 485, 779, 1025, 1045, 1067, 1843, 2255, 2425, 3895, 3977, 5225, 5335, 8569, 9215, 11275, 19475, 19885, 20273, 26675, 42845, 43747, 46075, 75563, 99425, 101365, 214225, 218735, 377815, 506825, 831193, 1093675, 1889075, 4155965, 20779825]

約数ペア:

[(1, 20779825), (5, 4155965), (11, 1889075), (19, 1093675), (25, 831193), (41, 506825), (55, 377815), (95, 218735), (97, 214225), (205, 101365), (209, 99425), (275, 75563), (451, 46075), (475, 43747), (485, 42845), (779, 26675), (1025, 20273), (1045, 19885), (1067, 19475), (1843, 11275), (2255, 9215), (2425, 8569), (3895, 5335), (3977, 5225)]