21281998

素因数分解:

$2^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{2801}}^1$

素因数の和:2963

約数の個数: 16

約数和(自身を含む): 33287760

約数和(自身を除く): 12005762

約数列:

[1, 2, 29, 58, 131, 262, 2801, 3799, 5602, 7598, 81229, 162458, 366931, 733862, 10640999, 21281998]

約数ペア:

[(1, 21281998), (2, 10640999), (29, 733862), (58, 366931), (131, 162458), (262, 81229), (2801, 7598), (3799, 5602)]