21490088

素因数分解:

$2^3\times {\mathrm{491}}^1\times {\mathrm{5471}}^1$

素因数の和:5968

約数の個数: 16

約数和(自身を含む): 40383360

約数和(自身を除く): 18893272

約数列:

[1, 2, 4, 8, 491, 982, 1964, 3928, 5471, 10942, 21884, 43768, 2686261, 5372522, 10745044, 21490088]

約数ペア:

[(1, 21490088), (2, 10745044), (4, 5372522), (8, 2686261), (491, 43768), (982, 21884), (1964, 10942), (3928, 5471)]