19886320

素因数分解:

$2^4\times 5^1\times {\mathrm{248579}}^1$

素因数の和:248592

約数の個数: 20

約数和(自身を含む): 46235880

約数和(自身を除く): 26349560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248579, 497158, 994316, 1242895, 1988632, 2485790, 3977264, 4971580, 9943160, 19886320]

約数ペア:

[(1, 19886320), (2, 9943160), (4, 4971580), (5, 3977264), (8, 2485790), (10, 1988632), (16, 1242895), (20, 994316), (40, 497158), (80, 248579)]