201428560

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{12781}}^1$

素因数の和:12991

約数の個数: 40

約数和(自身を含む): 470735496

約数和(自身を除く): 269306936

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1970, 3152, 3940, 7880, 12781, 15760, 25562, 51124, 63905, 102248, 127810, 204496, 255620, 511240, 1022480, 2517857, 5035714, 10071428, 12589285, 20142856, 25178570, 40285712, 50357140, 100714280, 201428560]

約数ペア:

[(1, 201428560), (2, 100714280), (4, 50357140), (5, 40285712), (8, 25178570), (10, 20142856), (16, 12589285), (20, 10071428), (40, 5035714), (80, 2517857), (197, 1022480), (394, 511240), (788, 255620), (985, 204496), (1576, 127810), (1970, 102248), (3152, 63905), (3940, 51124), (7880, 25562), (12781, 15760)]