21721826

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{643}}^1$

素因数の和:798

約数の個数: 32

約数和(自身を含む): 39567360

約数和(自身を除く): 17845534

約数列:

[1, 2, 7, 14, 19, 38, 127, 133, 254, 266, 643, 889, 1286, 1778, 2413, 4501, 4826, 9002, 12217, 16891, 24434, 33782, 81661, 85519, 163322, 171038, 571627, 1143254, 1551559, 3103118, 10860913, 21721826]

約数ペア:

[(1, 21721826), (2, 10860913), (7, 3103118), (14, 1551559), (19, 1143254), (38, 571627), (127, 171038), (133, 163322), (254, 85519), (266, 81661), (643, 33782), (889, 24434), (1286, 16891), (1778, 12217), (2413, 9002), (4501, 4826)]