81137775

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{181}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 139018880

約数和(自身を除く): 57881105

約数列:

[1, 3, 5, 15, 25, 43, 75, 129, 139, 181, 215, 417, 543, 645, 695, 905, 1075, 2085, 2715, 3225, 3475, 4525, 5977, 7783, 10425, 13575, 17931, 23349, 25159, 29885, 38915, 75477, 89655, 116745, 125795, 149425, 194575, 377385, 448275, 583725, 628975, 1081837, 1886925, 3245511, 5409185, 16227555, 27045925, 81137775]

約数ペア:

[(1, 81137775), (3, 27045925), (5, 16227555), (15, 5409185), (25, 3245511), (43, 1886925), (75, 1081837), (129, 628975), (139, 583725), (181, 448275), (215, 377385), (417, 194575), (543, 149425), (645, 125795), (695, 116745), (905, 89655), (1075, 75477), (2085, 38915), (2715, 29885), (3225, 25159), (3475, 23349), (4525, 17931), (5977, 13575), (7783, 10425)]