21172016

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{24967}}^1$

素因数の和:25028

約数の個数: 20

約数和(自身を含む): 41796432

約数和(自身を除く): 20624416

約数列:

[1, 2, 4, 8, 16, 53, 106, 212, 424, 848, 24967, 49934, 99868, 199736, 399472, 1323251, 2646502, 5293004, 10586008, 21172016]

約数ペア:

[(1, 21172016), (2, 10586008), (4, 5293004), (8, 2646502), (16, 1323251), (53, 399472), (106, 199736), (212, 99868), (424, 49934), (848, 24967)]