20442980

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{2549}}^1$

素因数の和:2959

約数の個数: 24

約数和(自身を含む): 43054200

約数和(自身を除く): 22611220

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 2549, 4010, 5098, 8020, 10196, 12745, 25490, 50980, 1022149, 2044298, 4088596, 5110745, 10221490, 20442980]

約数ペア:

[(1, 20442980), (2, 10221490), (4, 5110745), (5, 4088596), (10, 2044298), (20, 1022149), (401, 50980), (802, 25490), (1604, 12745), (2005, 10196), (2549, 8020), (4010, 5098)]