21051901

素因数分解:

${\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{127}}^1\times {\mathrm{311}}^1$

素因数の和:492

約数の個数: 16

約数和(自身を含む): 23482368

約数和(自身を除く): 2430467

約数列:

[1, 13, 41, 127, 311, 533, 1651, 4043, 5207, 12751, 39497, 67691, 165763, 513461, 1619377, 21051901]

約数ペア:

[(1, 21051901), (13, 1619377), (41, 513461), (127, 165763), (311, 67691), (533, 39497), (1651, 12751), (4043, 5207)]