20919075

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{181}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 36830976

約数和(自身を除く): 15911901

約数列:

[1, 3, 5, 15, 23, 25, 67, 69, 75, 115, 181, 201, 335, 345, 543, 575, 905, 1005, 1541, 1675, 1725, 2715, 4163, 4525, 4623, 5025, 7705, 12127, 12489, 13575, 20815, 23115, 36381, 38525, 60635, 62445, 104075, 115575, 181905, 278921, 303175, 312225, 836763, 909525, 1394605, 4183815, 6973025, 20919075]

約数ペア:

[(1, 20919075), (3, 6973025), (5, 4183815), (15, 1394605), (23, 909525), (25, 836763), (67, 312225), (69, 303175), (75, 278921), (115, 181905), (181, 115575), (201, 104075), (335, 62445), (345, 60635), (543, 38525), (575, 36381), (905, 23115), (1005, 20815), (1541, 13575), (1675, 12489), (1725, 12127), (2715, 7705), (4163, 5025), (4525, 4623)]