21681608

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{1279}}^1$

素因数の和:1461

約数の個数: 32

約数和(自身を含む): 44083200

約数和(自身を除く): 22401592

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 163, 326, 652, 1279, 1304, 2119, 2558, 4238, 5116, 8476, 10232, 16627, 16952, 33254, 66508, 133016, 208477, 416954, 833908, 1667816, 2710201, 5420402, 10840804, 21681608]

約数ペア:

[(1, 21681608), (2, 10840804), (4, 5420402), (8, 2710201), (13, 1667816), (26, 833908), (52, 416954), (104, 208477), (163, 133016), (326, 66508), (652, 33254), (1279, 16952), (1304, 16627), (2119, 10232), (2558, 8476), (4238, 5116)]