20081255000

素因数分解:

$2^3\times 5^4\times {\mathrm{251}}^1\times {\mathrm{16001}}^1$

素因数の和:16278

約数の個数: 80

約数和(自身を含む): 47240784360

約数和(自身を除く): 27159529360

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 251, 500, 502, 625, 1000, 1004, 1250, 1255, 2008, 2500, 2510, 5000, 5020, 6275, 10040, 12550, 16001, 25100, 31375, 32002, 50200, 62750, 64004, 80005, 125500, 128008, 156875, 160010, 251000, 313750, 320020, 400025, 627500, 640040, 800050, 1255000, 1600100, 2000125, 3200200, 4000250, 4016251, 8000500, 8032502, 10000625, 16001000, 16065004, 20001250, 20081255, 32130008, 40002500, 40162510, 80005000, 80325020, 100406275, 160650040, 200812550, 401625100, 502031375, 803250200, 1004062750, 2008125500, 2510156875, 4016251000, 5020313750, 10040627500, 20081255000]

約数ペア:

[(1, 20081255000), (2, 10040627500), (4, 5020313750), (5, 4016251000), (8, 2510156875), (10, 2008125500), (20, 1004062750), (25, 803250200), (40, 502031375), (50, 401625100), (100, 200812550), (125, 160650040), (200, 100406275), (250, 80325020), (251, 80005000), (500, 40162510), (502, 40002500), (625, 32130008), (1000, 20081255), (1004, 20001250), (1250, 16065004), (1255, 16001000), (2008, 10000625), (2500, 8032502), (2510, 8000500), (5000, 4016251), (5020, 4000250), (6275, 3200200), (10040, 2000125), (12550, 1600100), (16001, 1255000), (25100, 800050), (31375, 640040), (32002, 627500), (50200, 400025), (62750, 320020), (64004, 313750), (80005, 251000), (125500, 160010), (128008, 156875)]