20907981

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{547}}^1$

素因数の和:721

約数の個数: 24

約数和(自身を含む): 31459584

約数和(自身を除く): 10551603

約数列:

[1, 3, 9, 31, 93, 137, 279, 411, 547, 1233, 1641, 4247, 4923, 12741, 16957, 38223, 50871, 74939, 152613, 224817, 674451, 2323109, 6969327, 20907981]

約数ペア:

[(1, 20907981), (3, 6969327), (9, 2323109), (31, 674451), (93, 224817), (137, 152613), (279, 74939), (411, 50871), (547, 38223), (1233, 16957), (1641, 12741), (4247, 4923)]