665480020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{811561}}^1$

素因数の和:811611

約数の個数: 24

約数和(自身を含む): 1431595368

約数和(自身を除く): 766115348

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 811561, 1623122, 3246244, 4057805, 8115610, 16231220, 33274001, 66548002, 133096004, 166370005, 332740010, 665480020]

約数ペア:

[(1, 665480020), (2, 332740010), (4, 166370005), (5, 133096004), (10, 66548002), (20, 33274001), (41, 16231220), (82, 8115610), (164, 4057805), (205, 3246244), (410, 1623122), (820, 811561)]