18909940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{7109}}^1$

素因数の和:7144

約数の個数: 48

約数和(自身を含む): 47779200

約数和(自身を除く): 28869260

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 7109, 14218, 28436, 35545, 49763, 71090, 99526, 135071, 142180, 199052, 248815, 270142, 497630, 540284, 675355, 945497, 995260, 1350710, 1890994, 2701420, 3781988, 4727485, 9454970, 18909940]

約数ペア:

[(1, 18909940), (2, 9454970), (4, 4727485), (5, 3781988), (7, 2701420), (10, 1890994), (14, 1350710), (19, 995260), (20, 945497), (28, 675355), (35, 540284), (38, 497630), (70, 270142), (76, 248815), (95, 199052), (133, 142180), (140, 135071), (190, 99526), (266, 71090), (380, 49763), (532, 35545), (665, 28436), (1330, 14218), (2660, 7109)]