81971120

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{1901}}^1$

素因数の和:1939

約数の個数: 120

約数和(自身を含む): 241980048

約数和(自身を除く): 160008928

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 49, 55, 56, 70, 77, 80, 88, 98, 110, 112, 140, 154, 176, 196, 220, 245, 280, 308, 385, 392, 440, 490, 539, 560, 616, 770, 784, 880, 980, 1078, 1232, 1540, 1901, 1960, 2156, 2695, 3080, 3802, 3920, 4312, 5390, 6160, 7604, 8624, 9505, 10780, 13307, 15208, 19010, 20911, 21560, 26614, 30416, 38020, 41822, 43120, 53228, 66535, 76040, 83644, 93149, 104555, 106456, 133070, 146377, 152080, 167288, 186298, 209110, 212912, 266140, 292754, 334576, 372596, 418220, 465745, 532280, 585508, 731885, 745192, 836440, 931490, 1024639, 1064560, 1171016, 1463770, 1490384, 1672880, 1862980, 2049278, 2342032, 2927540, 3725960, 4098556, 5123195, 5855080, 7451920, 8197112, 10246390, 11710160, 16394224, 20492780, 40985560, 81971120]

約数ペア:

[(1, 81971120), (2, 40985560), (4, 20492780), (5, 16394224), (7, 11710160), (8, 10246390), (10, 8197112), (11, 7451920), (14, 5855080), (16, 5123195), (20, 4098556), (22, 3725960), (28, 2927540), (35, 2342032), (40, 2049278), (44, 1862980), (49, 1672880), (55, 1490384), (56, 1463770), (70, 1171016), (77, 1064560), (80, 1024639), (88, 931490), (98, 836440), (110, 745192), (112, 731885), (140, 585508), (154, 532280), (176, 465745), (196, 418220), (220, 372596), (245, 334576), (280, 292754), (308, 266140), (385, 212912), (392, 209110), (440, 186298), (490, 167288), (539, 152080), (560, 146377), (616, 133070), (770, 106456), (784, 104555), (880, 93149), (980, 83644), (1078, 76040), (1232, 66535), (1540, 53228), (1901, 43120), (1960, 41822), (2156, 38020), (2695, 30416), (3080, 26614), (3802, 21560), (3920, 20911), (4312, 19010), (5390, 15208), (6160, 13307), (7604, 10780), (8624, 9505)]