21331986

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{491}}^1\times {\mathrm{557}}^1$

素因数の和:1066

約数の個数: 32

約数和(自身を含む): 46122048

約数和(自身を除く): 24790062

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 491, 557, 982, 1114, 1473, 1671, 2946, 3342, 6383, 7241, 12766, 14482, 19149, 21723, 38298, 43446, 273487, 546974, 820461, 1640922, 3555331, 7110662, 10665993, 21331986]

約数ペア:

[(1, 21331986), (2, 10665993), (3, 7110662), (6, 3555331), (13, 1640922), (26, 820461), (39, 546974), (78, 273487), (491, 43446), (557, 38298), (982, 21723), (1114, 19149), (1473, 14482), (1671, 12766), (2946, 7241), (3342, 6383)]