81067580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{139}}^1\times {\mathrm{241}}^1$

素因数の和:411

約数の個数: 72

約数和(自身を含む): 189253680

約数和(自身を除く): 108186100

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 139, 220, 241, 242, 278, 482, 484, 556, 605, 695, 964, 1205, 1210, 1390, 1529, 2410, 2420, 2651, 2780, 3058, 4820, 5302, 6116, 7645, 10604, 13255, 15290, 16819, 26510, 29161, 30580, 33499, 33638, 53020, 58322, 66998, 67276, 84095, 116644, 133996, 145805, 167495, 168190, 291610, 334990, 336380, 368489, 583220, 669980, 736978, 1473956, 1842445, 3684890, 4053379, 7369780, 8106758, 16213516, 20266895, 40533790, 81067580]

約数ペア:

[(1, 81067580), (2, 40533790), (4, 20266895), (5, 16213516), (10, 8106758), (11, 7369780), (20, 4053379), (22, 3684890), (44, 1842445), (55, 1473956), (110, 736978), (121, 669980), (139, 583220), (220, 368489), (241, 336380), (242, 334990), (278, 291610), (482, 168190), (484, 167495), (556, 145805), (605, 133996), (695, 116644), (964, 84095), (1205, 67276), (1210, 66998), (1390, 58322), (1529, 53020), (2410, 33638), (2420, 33499), (2651, 30580), (2780, 29161), (3058, 26510), (4820, 16819), (5302, 15290), (6116, 13255), (7645, 10604)]