21139990

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{859}}^1$

素因数の和:996

約数の個数: 32

約数和(自身を含む): 40124160

約数和(自身を除く): 18984170

約数列:

[1, 2, 5, 10, 23, 46, 107, 115, 214, 230, 535, 859, 1070, 1718, 2461, 4295, 4922, 8590, 12305, 19757, 24610, 39514, 91913, 98785, 183826, 197570, 459565, 919130, 2113999, 4227998, 10569995, 21139990]

約数ペア:

[(1, 21139990), (2, 10569995), (5, 4227998), (10, 2113999), (23, 919130), (46, 459565), (107, 197570), (115, 183826), (214, 98785), (230, 91913), (535, 39514), (859, 24610), (1070, 19757), (1718, 12305), (2461, 8590), (4295, 4922)]