17920690

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{401}}^1$

素因数の和:558

約数の個数: 32

約数和(自身を含む): 33430320

約数和(自身を除く): 15509630

約数列:

[1, 2, 5, 10, 41, 82, 109, 205, 218, 401, 410, 545, 802, 1090, 2005, 4010, 4469, 8938, 16441, 22345, 32882, 43709, 44690, 82205, 87418, 164410, 218545, 437090, 1792069, 3584138, 8960345, 17920690]

約数ペア:

[(1, 17920690), (2, 8960345), (5, 3584138), (10, 1792069), (41, 437090), (82, 218545), (109, 164410), (205, 87418), (218, 82205), (401, 44690), (410, 43709), (545, 32882), (802, 22345), (1090, 16441), (2005, 8938), (4010, 4469)]