28778421

素因数分解:

$3^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{9859}}^1$

素因数の和:10008

約数の個数: 16

約数和(自身を含む): 44172800

約数和(自身を除く): 15394379

約数列:

[1, 3, 7, 21, 139, 417, 973, 2919, 9859, 29577, 69013, 207039, 1370401, 4111203, 9592807, 28778421]

約数ペア:

[(1, 28778421), (3, 9592807), (7, 4111203), (21, 1370401), (139, 207039), (417, 69013), (973, 29577), (2919, 9859)]