20472280

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{4969}}^1$

素因数の和:5083

約数の個数: 32

約数和(自身を含む): 46519200

約数和(自身を除く): 26046920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 4969, 9938, 19876, 24845, 39752, 49690, 99380, 198760, 511807, 1023614, 2047228, 2559035, 4094456, 5118070, 10236140, 20472280]

約数ペア:

[(1, 20472280), (2, 10236140), (4, 5118070), (5, 4094456), (8, 2559035), (10, 2047228), (20, 1023614), (40, 511807), (103, 198760), (206, 99380), (412, 49690), (515, 39752), (824, 24845), (1030, 19876), (2060, 9938), (4120, 4969)]