21383427

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{311}}^1$

素因数の和:411

約数の個数: 32

約数和(自身を含む): 32288256

約数和(自身を除く): 10904829

約数列:

[1, 3, 13, 39, 41, 43, 123, 129, 311, 533, 559, 933, 1599, 1677, 1763, 4043, 5289, 12129, 12751, 13373, 22919, 38253, 40119, 68757, 165763, 173849, 497289, 521547, 548293, 1644879, 7127809, 21383427]

約数ペア:

[(1, 21383427), (3, 7127809), (13, 1644879), (39, 548293), (41, 521547), (43, 497289), (123, 173849), (129, 165763), (311, 68757), (533, 40119), (559, 38253), (933, 22919), (1599, 13373), (1677, 12751), (1763, 12129), (4043, 5289)]