18919784

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{1669}}^1$

素因数の和:1797

約数の個数: 32

約数和(自身を含む): 38577000

約数和(自身を除く): 19657216

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 109, 218, 436, 872, 1417, 1669, 2834, 3338, 5668, 6676, 11336, 13352, 21697, 43394, 86788, 173576, 181921, 363842, 727684, 1455368, 2364973, 4729946, 9459892, 18919784]

約数ペア:

[(1, 18919784), (2, 9459892), (4, 4729946), (8, 2364973), (13, 1455368), (26, 727684), (52, 363842), (104, 181921), (109, 173576), (218, 86788), (436, 43394), (872, 21697), (1417, 13352), (1669, 11336), (2834, 6676), (3338, 5668)]