21997490

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{1559}}^1$

素因数の和:1666

約数の個数: 32

約数和(自身を含む): 42456960

約数和(自身を除く): 20459470

約数列:

[1, 2, 5, 10, 17, 34, 83, 85, 166, 170, 415, 830, 1411, 1559, 2822, 3118, 7055, 7795, 14110, 15590, 26503, 53006, 129397, 132515, 258794, 265030, 646985, 1293970, 2199749, 4399498, 10998745, 21997490]

約数ペア:

[(1, 21997490), (2, 10998745), (5, 4399498), (10, 2199749), (17, 1293970), (34, 646985), (83, 265030), (85, 258794), (166, 132515), (170, 129397), (415, 53006), (830, 26503), (1411, 15590), (1559, 14110), (2822, 7795), (3118, 7055)]