20808301960

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12687989}}^1$

素因数の和:12688041

約数の個数: 32

約数和(自身を含む): 47960602200

約数和(自身を除く): 27152300240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12687989, 25375978, 50751956, 63439945, 101503912, 126879890, 253759780, 507519560, 520207549, 1040415098, 2080830196, 2601037745, 4161660392, 5202075490, 10404150980, 20808301960]

約数ペア:

[(1, 20808301960), (2, 10404150980), (4, 5202075490), (5, 4161660392), (8, 2601037745), (10, 2080830196), (20, 1040415098), (40, 520207549), (41, 507519560), (82, 253759780), (164, 126879890), (205, 101503912), (328, 63439945), (410, 50751956), (820, 25375978), (1640, 12687989)]