205890280

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{20507}}^1$

素因数の和:20769

約数の個数: 32

約数和(自身を含む): 465121440

約数和(自身を除く): 259231160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 2008, 2510, 5020, 10040, 20507, 41014, 82028, 102535, 164056, 205070, 410140, 820280, 5147257, 10294514, 20589028, 25736285, 41178056, 51472570, 102945140, 205890280]

約数ペア:

[(1, 205890280), (2, 102945140), (4, 51472570), (5, 41178056), (8, 25736285), (10, 20589028), (20, 10294514), (40, 5147257), (251, 820280), (502, 410140), (1004, 205070), (1255, 164056), (2008, 102535), (2510, 82028), (5020, 41014), (10040, 20507)]