20898878

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^2\times {\mathrm{73}}^1$

素因数の和:130

約数の個数: 72

約数和(自身を含む): 43226064

約数和(自身を除く): 22327186

約数列:

[1, 2, 7, 11, 13, 14, 22, 26, 73, 77, 91, 121, 143, 146, 154, 169, 182, 242, 286, 338, 511, 803, 847, 949, 1001, 1022, 1183, 1573, 1606, 1694, 1859, 1898, 2002, 2366, 3146, 3718, 5621, 6643, 8833, 10439, 11011, 11242, 12337, 13013, 13286, 17666, 20449, 20878, 22022, 24674, 26026, 40898, 61831, 73073, 86359, 114829, 123662, 135707, 143143, 146146, 172718, 229658, 271414, 286286, 803803, 949949, 1492777, 1607606, 1899898, 2985554, 10449439, 20898878]

約数ペア:

[(1, 20898878), (2, 10449439), (7, 2985554), (11, 1899898), (13, 1607606), (14, 1492777), (22, 949949), (26, 803803), (73, 286286), (77, 271414), (91, 229658), (121, 172718), (143, 146146), (146, 143143), (154, 135707), (169, 123662), (182, 114829), (242, 86359), (286, 73073), (338, 61831), (511, 40898), (803, 26026), (847, 24674), (949, 22022), (1001, 20878), (1022, 20449), (1183, 17666), (1573, 13286), (1606, 13013), (1694, 12337), (1859, 11242), (1898, 11011), (2002, 10439), (2366, 8833), (3146, 6643), (3718, 5621)]