19889870

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1987}}^1$

素因数の和:2025

約数の個数: 64

約数和(自身を含む): 48093696

約数和(自身を除く): 28203826

約数列:

[1, 2, 5, 7, 10, 11, 13, 14, 22, 26, 35, 55, 65, 70, 77, 91, 110, 130, 143, 154, 182, 286, 385, 455, 715, 770, 910, 1001, 1430, 1987, 2002, 3974, 5005, 9935, 10010, 13909, 19870, 21857, 25831, 27818, 43714, 51662, 69545, 109285, 129155, 139090, 152999, 180817, 218570, 258310, 284141, 305998, 361634, 568282, 764995, 904085, 1420705, 1529990, 1808170, 1988987, 2841410, 3977974, 9944935, 19889870]

約数ペア:

[(1, 19889870), (2, 9944935), (5, 3977974), (7, 2841410), (10, 1988987), (11, 1808170), (13, 1529990), (14, 1420705), (22, 904085), (26, 764995), (35, 568282), (55, 361634), (65, 305998), (70, 284141), (77, 258310), (91, 218570), (110, 180817), (130, 152999), (143, 139090), (154, 129155), (182, 109285), (286, 69545), (385, 51662), (455, 43714), (715, 27818), (770, 25831), (910, 21857), (1001, 19870), (1430, 13909), (1987, 10010), (2002, 9935), (3974, 5005)]