21009112

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{389}}^1$

素因数の和:595

約数の個数: 32

約数和(自身を含む): 40669200

約数和(自身を除く): 19660088

約数列:

[1, 2, 4, 8, 43, 86, 157, 172, 314, 344, 389, 628, 778, 1256, 1556, 3112, 6751, 13502, 16727, 27004, 33454, 54008, 61073, 66908, 122146, 133816, 244292, 488584, 2626139, 5252278, 10504556, 21009112]

約数ペア:

[(1, 21009112), (2, 10504556), (4, 5252278), (8, 2626139), (43, 488584), (86, 244292), (157, 133816), (172, 122146), (314, 66908), (344, 61073), (389, 54008), (628, 33454), (778, 27004), (1256, 16727), (1556, 13502), (3112, 6751)]