21278216

素因数分解:

$2^3\times {\mathrm{47}}^1\times {\mathrm{56591}}^1$

素因数の和:56644

約数の個数: 16

約数和(自身を含む): 40746240

約数和(自身を除く): 19468024

約数列:

[1, 2, 4, 8, 47, 94, 188, 376, 56591, 113182, 226364, 452728, 2659777, 5319554, 10639108, 21278216]

約数ペア:

[(1, 21278216), (2, 10639108), (4, 5319554), (8, 2659777), (47, 452728), (94, 226364), (188, 113182), (376, 56591)]