16177780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{181}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 35315280

約数和(自身を除く): 19137500

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 109, 164, 181, 205, 218, 362, 410, 436, 545, 724, 820, 905, 1090, 1810, 2180, 3620, 4469, 7421, 8938, 14842, 17876, 19729, 22345, 29684, 37105, 39458, 44690, 74210, 78916, 89380, 98645, 148420, 197290, 394580, 808889, 1617778, 3235556, 4044445, 8088890, 16177780]

約数ペア:

[(1, 16177780), (2, 8088890), (4, 4044445), (5, 3235556), (10, 1617778), (20, 808889), (41, 394580), (82, 197290), (109, 148420), (164, 98645), (181, 89380), (205, 78916), (218, 74210), (362, 44690), (410, 39458), (436, 37105), (545, 29684), (724, 22345), (820, 19729), (905, 17876), (1090, 14842), (1810, 8938), (2180, 7421), (3620, 4469)]