21245416

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{85667}}^1$

素因数の和:85704

約数の個数: 16

約数和(自身を含む): 41120640

約数和(自身を除く): 19875224

約数列:

[1, 2, 4, 8, 31, 62, 124, 248, 85667, 171334, 342668, 685336, 2655677, 5311354, 10622708, 21245416]

約数ペア:

[(1, 21245416), (2, 10622708), (4, 5311354), (8, 2655677), (31, 685336), (62, 342668), (124, 171334), (248, 85667)]