20747990

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^2\times {\mathrm{127}}^1$

素因数の和:213

約数の個数: 48

約数和(自身を含む): 41181696

約数和(自身を除く): 20433706

約数列:

[1, 2, 5, 10, 17, 31, 34, 62, 85, 127, 155, 170, 254, 310, 527, 635, 961, 1054, 1270, 1922, 2159, 2635, 3937, 4318, 4805, 5270, 7874, 9610, 10795, 16337, 19685, 21590, 32674, 39370, 66929, 81685, 122047, 133858, 163370, 244094, 334645, 610235, 669290, 1220470, 2074799, 4149598, 10373995, 20747990]

約数ペア:

[(1, 20747990), (2, 10373995), (5, 4149598), (10, 2074799), (17, 1220470), (31, 669290), (34, 610235), (62, 334645), (85, 244094), (127, 163370), (155, 133858), (170, 122047), (254, 81685), (310, 66929), (527, 39370), (635, 32674), (961, 21590), (1054, 19685), (1270, 16337), (1922, 10795), (2159, 9610), (2635, 7874), (3937, 5270), (4318, 4805)]