19976240

素因数分解:

$2^4\times 5^1\times {\mathrm{249703}}^1$

素因数の和:249716

約数の個数: 20

約数和(自身を含む): 46444944

約数和(自身を除く): 26468704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 249703, 499406, 998812, 1248515, 1997624, 2497030, 3995248, 4994060, 9988120, 19976240]

約数ペア:

[(1, 19976240), (2, 9988120), (4, 4994060), (5, 3995248), (8, 2497030), (10, 1997624), (16, 1248515), (20, 998812), (40, 499406), (80, 249703)]