21248980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{62497}}^1$

素因数の和:62523

約数の個数: 24

約数和(自身を含む): 47248488

約数和(自身を除く): 25999508

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 62497, 124994, 249988, 312485, 624970, 1062449, 1249940, 2124898, 4249796, 5312245, 10624490, 21248980]

約数ペア:

[(1, 21248980), (2, 10624490), (4, 5312245), (5, 4249796), (10, 2124898), (17, 1249940), (20, 1062449), (34, 624970), (68, 312485), (85, 249988), (170, 124994), (340, 62497)]