18720020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{85091}}^1$

素因数の和:85111

約数の個数: 24

約数和(自身を含む): 42886368

約数和(自身を除く): 24166348

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 85091, 170182, 340364, 425455, 850910, 936001, 1701820, 1872002, 3744004, 4680005, 9360010, 18720020]

約数ペア:

[(1, 18720020), (2, 9360010), (4, 4680005), (5, 3744004), (10, 1872002), (11, 1701820), (20, 936001), (22, 850910), (44, 425455), (55, 340364), (110, 170182), (220, 85091)]