21097907920

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6432289}}^1$

素因数の和:6432343

約数の個数: 40

約数和(自身を含む): 50249049480

約数和(自身を除く): 29151141560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6432289, 12864578, 25729156, 32161445, 51458312, 64322890, 102916624, 128645780, 257291560, 263723849, 514583120, 527447698, 1054895396, 1318619245, 2109790792, 2637238490, 4219581584, 5274476980, 10548953960, 21097907920]

約数ペア:

[(1, 21097907920), (2, 10548953960), (4, 5274476980), (5, 4219581584), (8, 2637238490), (10, 2109790792), (16, 1318619245), (20, 1054895396), (40, 527447698), (41, 514583120), (80, 263723849), (82, 257291560), (164, 128645780), (205, 102916624), (328, 64322890), (410, 51458312), (656, 32161445), (820, 25729156), (1640, 12864578), (3280, 6432289)]