20498530

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{193}}^1$

素因数の和:275

約数の個数: 64

約数和(自身を含む): 43021440

約数和(自身を除く): 22522910

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 43, 65, 86, 95, 130, 190, 193, 215, 247, 386, 430, 494, 559, 817, 965, 1118, 1235, 1634, 1930, 2470, 2509, 2795, 3667, 4085, 5018, 5590, 7334, 8170, 8299, 10621, 12545, 16598, 18335, 21242, 25090, 36670, 41495, 47671, 53105, 82990, 95342, 106210, 107887, 157681, 215774, 238355, 315362, 476710, 539435, 788405, 1078870, 1576810, 2049853, 4099706, 10249265, 20498530]

約数ペア:

[(1, 20498530), (2, 10249265), (5, 4099706), (10, 2049853), (13, 1576810), (19, 1078870), (26, 788405), (38, 539435), (43, 476710), (65, 315362), (86, 238355), (95, 215774), (130, 157681), (190, 107887), (193, 106210), (215, 95342), (247, 82990), (386, 53105), (430, 47671), (494, 41495), (559, 36670), (817, 25090), (965, 21242), (1118, 18335), (1235, 16598), (1634, 12545), (1930, 10621), (2470, 8299), (2509, 8170), (2795, 7334), (3667, 5590), (4085, 5018)]