18911990

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{2099}}^1$

素因数の和:2176

約数の個数: 32

約数和(自身を含む): 36741600

約数和(自身を除く): 17829610

約数列:

[1, 2, 5, 10, 17, 34, 53, 85, 106, 170, 265, 530, 901, 1802, 2099, 4198, 4505, 9010, 10495, 20990, 35683, 71366, 111247, 178415, 222494, 356830, 556235, 1112470, 1891199, 3782398, 9455995, 18911990]

約数ペア:

[(1, 18911990), (2, 9455995), (5, 3782398), (10, 1891199), (17, 1112470), (34, 556235), (53, 356830), (85, 222494), (106, 178415), (170, 111247), (265, 71366), (530, 35683), (901, 20990), (1802, 10495), (2099, 9010), (4198, 4505)]