20899892

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{719}}^1$

素因数の和:792

約数の個数: 36

約数和(自身を含む): 40582080

約数和(自身を除く): 19682188

約数列:

[1, 2, 4, 13, 26, 43, 52, 86, 169, 172, 338, 559, 676, 719, 1118, 1438, 2236, 2876, 7267, 9347, 14534, 18694, 29068, 30917, 37388, 61834, 121511, 123668, 243022, 401921, 486044, 803842, 1607684, 5224973, 10449946, 20899892]

約数ペア:

[(1, 20899892), (2, 10449946), (4, 5224973), (13, 1607684), (26, 803842), (43, 486044), (52, 401921), (86, 243022), (169, 123668), (172, 121511), (338, 61834), (559, 37388), (676, 30917), (719, 29068), (1118, 18694), (1438, 14534), (2236, 9347), (2876, 7267)]