280147240

素因数分解:

$2^3\times 5^1\times {\mathrm{1979}}^1\times {\mathrm{3539}}^1$

素因数の和:5529

約数の個数: 32

約数和(自身を含む): 630828000

約数和(自身を除く): 350680760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1979, 3539, 3958, 7078, 7916, 9895, 14156, 15832, 17695, 19790, 28312, 35390, 39580, 70780, 79160, 141560, 7003681, 14007362, 28014724, 35018405, 56029448, 70036810, 140073620, 280147240]

約数ペア:

[(1, 280147240), (2, 140073620), (4, 70036810), (5, 56029448), (8, 35018405), (10, 28014724), (20, 14007362), (40, 7003681), (1979, 141560), (3539, 79160), (3958, 70780), (7078, 39580), (7916, 35390), (9895, 28312), (14156, 19790), (15832, 17695)]