663380

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{809}}^1$

素因数の和:859

約数の個数: 24

約数和(自身を含む): 1428840

約数和(自身を除く): 765460

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 809, 820, 1618, 3236, 4045, 8090, 16180, 33169, 66338, 132676, 165845, 331690, 663380]

約数ペア:

[(1, 663380), (2, 331690), (4, 165845), (5, 132676), (10, 66338), (20, 33169), (41, 16180), (82, 8090), (164, 4045), (205, 3236), (410, 1618), (809, 820)]