19984180

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{1109}}^1$

素因数の和:1188

約数の個数: 48

約数和(自身を含む): 45314640

約数和(自身を除く): 25330460

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 53, 68, 85, 106, 170, 212, 265, 340, 530, 901, 1060, 1109, 1802, 2218, 3604, 4436, 4505, 5545, 9010, 11090, 18020, 18853, 22180, 37706, 58777, 75412, 94265, 117554, 188530, 235108, 293885, 377060, 587770, 999209, 1175540, 1998418, 3996836, 4996045, 9992090, 19984180]

約数ペア:

[(1, 19984180), (2, 9992090), (4, 4996045), (5, 3996836), (10, 1998418), (17, 1175540), (20, 999209), (34, 587770), (53, 377060), (68, 293885), (85, 235108), (106, 188530), (170, 117554), (212, 94265), (265, 75412), (340, 58777), (530, 37706), (901, 22180), (1060, 18853), (1109, 18020), (1802, 11090), (2218, 9010), (3604, 5545), (4436, 4505)]