20653990

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{691}}^1$

素因数の和:773

約数の個数: 48

約数和(自身を含む): 44019504

約数和(自身を除く): 23365514

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 61, 70, 98, 122, 245, 305, 427, 490, 610, 691, 854, 1382, 2135, 2989, 3455, 4270, 4837, 5978, 6910, 9674, 14945, 24185, 29890, 33859, 42151, 48370, 67718, 84302, 169295, 210755, 295057, 338590, 421510, 590114, 1475285, 2065399, 2950570, 4130798, 10326995, 20653990]

約数ペア:

[(1, 20653990), (2, 10326995), (5, 4130798), (7, 2950570), (10, 2065399), (14, 1475285), (35, 590114), (49, 421510), (61, 338590), (70, 295057), (98, 210755), (122, 169295), (245, 84302), (305, 67718), (427, 48370), (490, 42151), (610, 33859), (691, 29890), (854, 24185), (1382, 14945), (2135, 9674), (2989, 6910), (3455, 5978), (4270, 4837)]