687980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{839}}^1$

素因数の和:889

約数の個数: 24

約数和(自身を含む): 1481760

約数和(自身を除く): 793780

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 839, 1678, 3356, 4195, 8390, 16780, 34399, 68798, 137596, 171995, 343990, 687980]

約数ペア:

[(1, 687980), (2, 343990), (4, 171995), (5, 137596), (10, 68798), (20, 34399), (41, 16780), (82, 8390), (164, 4195), (205, 3356), (410, 1678), (820, 839)]