21157690

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{7321}}^1$

素因数の和:7362

約数の個数: 24

約数和(自身を含む): 40461372

約数和(自身を除く): 19303682

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 289, 578, 1445, 2890, 7321, 14642, 36605, 73210, 124457, 248914, 622285, 1244570, 2115769, 4231538, 10578845, 21157690]

約数ペア:

[(1, 21157690), (2, 10578845), (5, 4231538), (10, 2115769), (17, 1244570), (34, 622285), (85, 248914), (170, 124457), (289, 73210), (578, 36605), (1445, 14642), (2890, 7321)]