18489820

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{449}}^1$

素因数の和:558

約数の個数: 48

約数和(自身を含む): 40824000

約数和(自身を除く): 22334180

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 71, 116, 142, 145, 284, 290, 355, 449, 580, 710, 898, 1420, 1796, 2059, 2245, 4118, 4490, 8236, 8980, 10295, 13021, 20590, 26042, 31879, 41180, 52084, 63758, 65105, 127516, 130210, 159395, 260420, 318790, 637580, 924491, 1848982, 3697964, 4622455, 9244910, 18489820]

約数ペア:

[(1, 18489820), (2, 9244910), (4, 4622455), (5, 3697964), (10, 1848982), (20, 924491), (29, 637580), (58, 318790), (71, 260420), (116, 159395), (142, 130210), (145, 127516), (284, 65105), (290, 63758), (355, 52084), (449, 41180), (580, 31879), (710, 26042), (898, 20590), (1420, 13021), (1796, 10295), (2059, 8980), (2245, 8236), (4118, 4490)]