20120775

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{367}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 36140544

約数和(自身を除く): 16019769

約数列:

[1, 3, 5, 15, 17, 25, 43, 51, 75, 85, 129, 215, 255, 367, 425, 645, 731, 1075, 1101, 1275, 1835, 2193, 3225, 3655, 5505, 6239, 9175, 10965, 15781, 18275, 18717, 27525, 31195, 47343, 54825, 78905, 93585, 155975, 236715, 268277, 394525, 467925, 804831, 1183575, 1341385, 4024155, 6706925, 20120775]

約数ペア:

[(1, 20120775), (3, 6706925), (5, 4024155), (15, 1341385), (17, 1183575), (25, 804831), (43, 467925), (51, 394525), (75, 268277), (85, 236715), (129, 155975), (215, 93585), (255, 78905), (367, 54825), (425, 47343), (645, 31195), (731, 27525), (1075, 18717), (1101, 18275), (1275, 15781), (1835, 10965), (2193, 9175), (3225, 6239), (3655, 5505)]