19858480

素因数分解:

$2^4\times 5^1\times {\mathrm{248231}}^1$

素因数の和:248244

約数の個数: 20

約数和(自身を含む): 46171152

約数和(自身を除く): 26312672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248231, 496462, 992924, 1241155, 1985848, 2482310, 3971696, 4964620, 9929240, 19858480]

約数ペア:

[(1, 19858480), (2, 9929240), (4, 4964620), (5, 3971696), (8, 2482310), (10, 1985848), (16, 1241155), (20, 992924), (40, 496462), (80, 248231)]