20778008

素因数分解:

$2^3\times {\mathrm{71}}^1\times {\mathrm{157}}^1\times {\mathrm{233}}^1$

素因数の和:467

約数の個数: 32

約数和(自身を含む): 39929760

約数和(自身を除く): 19151752

約数列:

[1, 2, 4, 8, 71, 142, 157, 233, 284, 314, 466, 568, 628, 932, 1256, 1864, 11147, 16543, 22294, 33086, 36581, 44588, 66172, 73162, 89176, 132344, 146324, 292648, 2597251, 5194502, 10389004, 20778008]

約数ペア:

[(1, 20778008), (2, 10389004), (4, 5194502), (8, 2597251), (71, 292648), (142, 146324), (157, 132344), (233, 89176), (284, 73162), (314, 66172), (466, 44588), (568, 36581), (628, 33086), (932, 22294), (1256, 16543), (1864, 11147)]