20007440

素因数分解:

$2^4\times 5^1\times {\mathrm{449}}^1\times {\mathrm{557}}^1$

素因数の和:1019

約数の個数: 40

約数和(自身を含む): 46704600

約数和(自身を除く): 26697160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 449, 557, 898, 1114, 1796, 2228, 2245, 2785, 3592, 4456, 4490, 5570, 7184, 8912, 8980, 11140, 17960, 22280, 35920, 44560, 250093, 500186, 1000372, 1250465, 2000744, 2500930, 4001488, 5001860, 10003720, 20007440]

約数ペア:

[(1, 20007440), (2, 10003720), (4, 5001860), (5, 4001488), (8, 2500930), (10, 2000744), (16, 1250465), (20, 1000372), (40, 500186), (80, 250093), (449, 44560), (557, 35920), (898, 22280), (1114, 17960), (1796, 11140), (2228, 8980), (2245, 8912), (2785, 7184), (3592, 5570), (4456, 4490)]