81444279

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{101}}^1$

素因数の和:220

約数の個数: 64

約数和(自身を含む): 137871360

約数和(自身を除く): 56427081

約数列:

[1, 3, 7, 19, 21, 43, 47, 57, 101, 129, 133, 141, 301, 303, 329, 399, 707, 817, 893, 903, 987, 1919, 2021, 2121, 2451, 2679, 4343, 4747, 5719, 5757, 6063, 6251, 13029, 13433, 14147, 14241, 17157, 18753, 30401, 33229, 38399, 40299, 42441, 82517, 90193, 91203, 99687, 115197, 204121, 247551, 268793, 270579, 577619, 612363, 631351, 806379, 1428847, 1732857, 1894053, 3878299, 4286541, 11634897, 27148093, 81444279]

約数ペア:

[(1, 81444279), (3, 27148093), (7, 11634897), (19, 4286541), (21, 3878299), (43, 1894053), (47, 1732857), (57, 1428847), (101, 806379), (129, 631351), (133, 612363), (141, 577619), (301, 270579), (303, 268793), (329, 247551), (399, 204121), (707, 115197), (817, 99687), (893, 91203), (903, 90193), (987, 82517), (1919, 42441), (2021, 40299), (2121, 38399), (2451, 33229), (2679, 30401), (4343, 18753), (4747, 17157), (5719, 14241), (5757, 14147), (6063, 13433), (6251, 13029)]