19976680

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{3181}}^1$

素因数の和:3349

約数の個数: 32

約数和(自身を含む): 45248040

約数和(自身を除く): 25271360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 3181, 6280, 6362, 12724, 15905, 25448, 31810, 63620, 127240, 499417, 998834, 1997668, 2497085, 3995336, 4994170, 9988340, 19976680]

約数ペア:

[(1, 19976680), (2, 9988340), (4, 4994170), (5, 3995336), (8, 2497085), (10, 1997668), (20, 998834), (40, 499417), (157, 127240), (314, 63620), (628, 31810), (785, 25448), (1256, 15905), (1570, 12724), (3140, 6362), (3181, 6280)]