21044260

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{2143}}^1$

素因数の和:2643

約数の個数: 24

約数和(自身を含む): 44303616

約数和(自身を除く): 23259356

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1964, 2143, 2455, 4286, 4910, 8572, 9820, 10715, 21430, 42860, 1052213, 2104426, 4208852, 5261065, 10522130, 21044260]

約数ペア:

[(1, 21044260), (2, 10522130), (4, 5261065), (5, 4208852), (10, 2104426), (20, 1052213), (491, 42860), (982, 21430), (1964, 10715), (2143, 9820), (2455, 8572), (4286, 4910)]