21939785

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{277}}^1$

素因数の和:393

約数の個数: 32

約数和(自身を含む): 31598592

約数和(自身を除く): 9658807

約数列:

[1, 5, 7, 31, 35, 73, 155, 217, 277, 365, 511, 1085, 1385, 1939, 2263, 2555, 8587, 9695, 11315, 15841, 20221, 42935, 60109, 79205, 101105, 141547, 300545, 626851, 707735, 3134255, 4387957, 21939785]

約数ペア:

[(1, 21939785), (5, 4387957), (7, 3134255), (31, 707735), (35, 626851), (73, 300545), (155, 141547), (217, 101105), (277, 79205), (365, 60109), (511, 42935), (1085, 20221), (1385, 15841), (1939, 11315), (2263, 9695), (2555, 8587)]