19943900

素因数分解:

$2^2\times 5^2\times {\mathrm{53}}^2\times {\mathrm{71}}^1$

素因数の和:191

約数の個数: 54

約数和(自身を含む): 44731512

約数和(自身を除く): 24787612

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 53, 71, 100, 106, 142, 212, 265, 284, 355, 530, 710, 1060, 1325, 1420, 1775, 2650, 2809, 3550, 3763, 5300, 5618, 7100, 7526, 11236, 14045, 15052, 18815, 28090, 37630, 56180, 70225, 75260, 94075, 140450, 188150, 199439, 280900, 376300, 398878, 797756, 997195, 1994390, 3988780, 4985975, 9971950, 19943900]

約数ペア:

[(1, 19943900), (2, 9971950), (4, 4985975), (5, 3988780), (10, 1994390), (20, 997195), (25, 797756), (50, 398878), (53, 376300), (71, 280900), (100, 199439), (106, 188150), (142, 140450), (212, 94075), (265, 75260), (284, 70225), (355, 56180), (530, 37630), (710, 28090), (1060, 18815), (1325, 15052), (1420, 14045), (1775, 11236), (2650, 7526), (2809, 7100), (3550, 5618), (3763, 5300)]